T^CA^Tffr ^#oM COL. GEORGE WASHINGTON FLOWERS MEMORIAL COLLECTION TRINITY COLLEGE LIBRARY DURHAM. N.C. Established by the family of COL. GEORGE WASHINGTON FLOWERS Date_ n , // ^ AN ELEMENTARY TREATISE ON ADVANCED- GUARD, OUT-POST, AND DETACHMENT SERVICE OF TROOPS, AND THB MANNER OF POSTING AND HANDLING THEM IN PRESENCE OF AN ENEMY. INTENDED AS A SUPPLEMENT TO THE SYSTEM OF TACTICS Adopted for the military service of the United States, and especially for the use of Officers of Militia and Volunteers. i?Y i>. ir. ]M[^Hj\.iv, PBOraSROB OF UILITABT AND CIVIL ENatNIBBINQ, AND OF TRI BCIERCB Or WAB, IN THB UNITED BTATBS' MILITABX ACADEMY. NEW ORLEANS : ^loomfield <^ Bteel, ^oohsellers and Stationers. 1861. -/. J- y -• • ♦- CHAPTER I. MANNER OF PLACING AND HANDLING TROOPS • 9 CHAPTER II. POSITIONS ■ .... 26 CHAPTER III. ADVANCED-GUARDS AND ADVANCED-POSTS • - 49 CHAPTER IV. REC0NN0IS3ANCES 73 CHAPTER V. DETACHMENTS 87 CHAPTER VI. CONVOYS 123 CHAPTER VII. SURPRISES AND AMBUSCADES 140 178018 Digitized by the Internet Arciiive in 2010 with funding from Duke University Libraries http://www.archive.org/details/elementarytreatiOOmaha I»REFA.C E. The want of a work of this kind has long been felt among our officers of Militia generally, as English literature is quite barren in systematic works on most branches of the military art, especially so on the one known among the military writers of the continent as La Petite Guerre, or the manner of conducting the operations of small independent bodies of troops ; and but few of these officers are able to devote that time to military studies, which their pursuit in a foreign lan- guage necassarily demands. In making this compilation, the works in most repute have been carefully consulted, and a selection made from them of what was deemed to be most useful to the class of readers for which it is intended. The object of the writer has been to give a concise but clear view of the essential points in each of the subjects introduced into the work; if he has succeed- ed in this, he trusts that the very obvious defects of the work will be overlooked. 17S018 CHAPTER I. MANNER OF PLACING AND HANDLING TROOPS.' INFANTRY, 1. Position and Formation. — On the field of battle, whether the object be to attack, or defend, the infantry is divided into three bodies ; an advanced-guard, the main-body, and a reserve. Their relative proportion will depend upon the total force, and the character of the position occupied. The advance-guard must be of sufficient strength to hold the enemy in check, but, at the same time, the main body, upon which the brunt of the action should fall, must not be left of insuflScicnt force, by unnecessarily increasing the advanced-guard; and the reserve should be strong enough to repair any disaster that may befall the main body, or to profit by its success in accomplish- ing the complete overthrow of the enemj\ 2. These three bodies are separated from each other by intervals which will depend upon the nature of the ground. The advanced-guard occupying the front; the main bod}' at a distance from 150 to 300 paces in its rear ; and the reserve at a like interval to the rear of the main body. Where the ground, for example, is undulating, and therefore favorable to B 10 INFANTRY. masking the troops from the enemj^'s fire, these inter- vals may, if requisite, be reduced to 80 or 100 paces. 3. The troops composing these three bodies will be formed either in columns of battalions, or be deployed, according to the circumstances under which they may be placed. For an attack, for evolution, or for defence against cavalry, the formation of columns of battalions is best. To repel the enemy's attack by a fire, and in some cases, to present a less favorable mark to his artillery, the battalions are deployed. The battalions, whether deployed or in column, preserve the proper intervals for evolutions; these intervals may be increased in obstructed ground without weakening the defence. 4. The battalions composing the main body may be drawn up in one or^two lines. The latter usually obtains only when a large force is present. In this case the reserve no longer holds the position of a third line, as in the other, but forms an independent body, to be used according to emergency ; the second line supporting the battalions of the first, and, for this purpose, occupying positions to the rear, opposite to their intervals. 5. Defence. — When the position is taken up to receive the enemy's attack, and then either to remain on the defensive, or to assume the offensive, as cir- cumstances may justify, the advanced-guard will be posted on the ground most favorable to hold the enemy in check, and so force him, by disputing it with tenacity, to develope his means and plans. This is best done by a judicious combat of skirmish- INFANTRY. 11 ers, who, for this purpose, are thrown forward 300 or 400 paces, to feel the enemy, and are only reinforced when closely pressed. 6. Whether the advanced-guard shall maintain its ground obstinately until reinforced by the main-body, or whether it shall fall back, either on the flanks or to the rear of the main-body, must be determined by the strength of its position. If this be so strong that the enemy's loss in carrying it must be great, then it should be pertinaciously maintained; in the contrary case it must, after a suitable show of resistance, be abandoned. 7. As a general rule, troops should be placed aS' much out of view as practicable before tliey go into- action, by taking advantage of covers offered by the ground. The main-body should be kept masked in this way until it is called to engage the enemy. If it advance to support the advanced-guard, it will usually attack with the bayonet; if the advanced- guard is called in, the main -body will usually receive the enemy by its fire ; the battalions being deployed for this purpose. If the enemy is staggered by this fire, or, in advancing, shows, by the wavering or confusion of his lino, a want of confidence, the fire may be followed up either by a charge of the troops in line, or they may be formed in columns of attack before charging, if the enemy perseveres in his onward movement. A charge by column, when the enemy is within fifty paces, will prove effective, if resolutely made. 8. The reserve is composed of the most reliable 12 INFANTRY. troops. It should be distinguished for cool courage; acting under all circumstances, either defensive or offensive, with circumspection and determined reso- lution. As the object of the reserve is to infuse greater energy into the action of the main-body, and, if necessary, to strike a lapt and decisive blow, it should be kept masked from the enemy's fire and view until called into action. The proper moment for engaging the reserve is either when the enemy has been shaken in his attack by the resistance offered by the main- body, or when the latter is unable farther to resist the enemy's efforts. If engaged too soon, the resist- ance offered to the reserve may prevent its making a decisive blow ; if not engaged in time, the main-body may be too far exhausted and disorganized to rally. In cases where the reserve forms a second line, to support the main-body, it should approach the first line when it becomes engaged, to be ready to replace it when circumstances may render it necessary. The advanced-guard, in such cases, should retire to the rear to act as a reserve. 9. Attack. — In the attack of infantry, the same fundamental dispositions are made as for the defensive. The advanced-guard will not throw forward its skir- mishers until they are near enough to engage the enemy. The line of skirmishers should be strongly supported, and will press the enemy with vigor and without relaxation. If the force engaged be small, the main-body will regulate its movements by those INFANTRY. 13 of the line of skirmishers ; if considerable, the reverse will obtain. 10. The main-body and reserve follow in column the advanced-guard, preserving the requisite intervals. The columns should take every advantage of the ground to mask their movements, getting rapidly over any where they are much exposed to fire. So soon as the advanced-guard is checked, it will fall back either on the flanks of the columns, or to the rear; and the main-body will be immediately brought into action, either by deploying and opening its fire, or by a vig- orous charge with the bayonet. If the main-body falters in its attack, or gives any signs of want of resolution, the reserve should advance at once through the intervals, and make a vigorous charge with the bayonet. 11. If the attack by the main-body is made with the bayonet, the interval between it and the columns of the reserve may be lessened to 80 or 100 paces. The flanks of the columns of attack, and the inter- vals between them, should be occupied by skirmishers. This is an important precaution, as, by forcing the eneni}' to deliver his fire before the columns have reached within a destructive range, the main obstacle to their onward movement will be removed. 12. Parsidt. — If the assailed retires, the pursuit must be conducted with system and in good order. The line nearest the enemy will throw forward a few troops in pursuit, which, in most cases, will be pre- ceded by skirmishers. The line, in close order, will follow these troops until it attains a good position to 14 INFANTRY. receive the enemy, should he make an oifensive move- ment, when it will be halted and formed in readiness for action. A pursuit by infantrj- alone cannot be pushed far, even should the enemy retire without any order, or show of resistance, as the retreating force will soon distance their pursuers. 13. Retreat. — When, either in the defensive, or offensive, it becomes necessary to retire, the first point to be attended to is to withdraw the troops engaged, either to a good position to their rear, where they can halt and face the enemy, or else behind the line in their rear, which should hold the assailants in check, and allow the retreating troops to fall back in good order. Having fairly got disengaged, dispositions must be promptly made to withdraw from the field. This may be done by the entire force moving ofi^" together, if the enemy shows no disposition to follow up his success with energy; or, in the contrary case, by retiring by successive portions; the line which with- draws falling some 150 paces to the rear of the one b}'- which it is covered, whilst falling back, and then forming, to cover in turn the retreat of the latter. The dispositions made in the retreat will depend entirely upon the character of the enemy's pursuit, iind the features of the ground. It will usually be made in columns, covered by skirmishers, if the pur- suit is made by infantr}- alone ; if by cavalry, the retreat must be made with great circumspection ; the troops retiring slowly and in good order, adopting the formation against cavalry ; never hastening the march, unless very near a good position for defence. IXFANTBY. 15 which should ho attained as rapidly as possible, unless closely pressed by the cavalry. 14. If it be necessary to continue the retreat for some marches, under the eye of the enemy, a rear- guard must be formed; selecting, from a fourth to a third of the entire force, for this service. The main duty of the rear-guard is to hinder the enemy from, pressing too closely on the main-body; and it should therefore, under no circumstances, allow itself to be forced back upon the main-body. The dispositions adopted by the rear-guard will depend upon the fea- tures of the ground ; its rear will usuallj' be covered by a line of skirmif-hers. The rear-guard will keep within g(jod supporting distance of the main-body; and, when pressed by the enemy, the latter, whenever a favorable position offers, will halt and form ; to cover the former, and force the enemy to greater cir- cumspection. lo. Measures for protracting an Engagement. — In the attack, asin thedefonce, it may frequently become an object to protract an engagement, witliout coming to any decisive result, either for the purpose of hold- ing a position for a certain time, to favor other ob- jects, as the arrival of reinforcements, or to occupy an adversary upon one point, whilst a decisive blow is preparing on another. This game can be played only upon ground favorable to alternations from the defensive to the offensive, and should only be intrusted to troops thoroughly conversant with tl^e duties of skirmishers. The main-body is kept some two thou- sand paces to the rear of the skirmishers in such atiairs, 16 INFANTRY. taking advantage of the ground, and making suitable dispositions of the troops to avoid the effects of the enemy's artillery. Small columns are thrown forward between itself and the troops engaged, which take post in covered ground, to be at hand to support the skirmishers. The troops engaged should be promptly reinforced, when the enemy presses onward ; and attempts should be made, by charging him in flank, to force him to retire. The troops in action should be frequently relieved, and the opportunity should be seized, when the fresh troops come up, to make an onward movement on the enemy and force him from any points he may have gained. 16. Defence against Cavalry. — When infantry is threatened by cavalry, the proper formation to repel its charge is that of squares. If but one square is formed, it must rely on its own resources to beat off the enemy ; but when there are several they may give [mutual support, by bringing a flank fire from one upon a force advancing on either of the two con- tiguous to it. The safety of infantry against cavalry will depend upon the preservation of perfect coolness, good order, and connection in the ranks: the avoid- ance of any precipitate movements which might bring about a surprise ; and the husbanding of its ammuni- tion, and reservation of its fire until the enemy is within a deadly range. Well disciplined infantry, whilst in position, and when not exposed to a fire of artillery, may securely trust to its own resources to repulse the best cavalry, so long as it adopts the proper precautions. If annoyed, as sometimes may happen. INFANTRY. IT by the fire of a few horpemen, advanced to draw the- fire of the squares, it will be better to throw out some- skirmishers, ten or twelve paces from the squares, to- keep otF such attacks, than to open a fire from the squares. 17. Defrncr, ^'c, agaiyist Artilleiy. — Infantry mny^ take advantage, eiiher of covers presented by the fea- tures of the ground, or of occasionally shifting its position, to avoid the fire of artiller}-. Very slight undulations, or obstructions, like the low banks along the borders of ditches, will serve to cover troops, by causing the shot to rise above them. If no covers arc at hand, the chances of casualties, when within point- blank range, may be diminished by moving forward^ or backward some 50 paces ; if the fire be a ricochet, the position should be shifted some 50 paces to the- right or left. The enemy's batteries may be annoyed, and sometimes forced to change their position, by sending out good marksmen, who advance singly to- within some 250 paces of them, where, lying down,, they can pick off the officers, men and horses. 18. Attack of Artillery — "Whenever it is found ne- cessary to carry a battery by the bayonet, the troops for this duty are divided into two detachments, one of which is charged with capturing the guns, and the other with attacking the supports of the battery. The dispositions made by the detachment which- moves against the guns will be the usual one of skir- mishers : the line surrounding the battery, and open- ing their fire upon it when within about 250 paces,, taking advantage for this purpose of any covers to 18 CAVALRY. screen the men. The supports of the line of skir- mishers should be kept well to the rear to be ready against a flank movement on the line. If this ma- noeuvre succeeds in drawing the fire of the guns, and any confusion is observed among the men, then a rush must be immediately made upon them with the bayonet. The detachment against the supports of the bat- tery will make its dispositions according to the kind of troops which comj^ose the sup})orts. If of infantry, the detachment to seize the guns, divided into two portions, will advance either in line or column, as may be best, on the flanks of the line of skirmishers, gradually getting in advance of it, and closing on the flanks of the battery, so as to attack the supports in flank ; or else they may keep to the rear of the line of skirmishers, in order to tempt the supports to move forward, and thus mask the tire of their guns. If the supports are of cavalry, the detachment, di- vided into two columns, will follow the line of skir- mishers, in rear of the flanks, to cover it against a •charge of the cavalry. CAVALRY. 19. Positmi. — This arm is usually placed in the rear of the infantry, on ground favorable to its ma- noeuvres, and where it will be masked from fire until the moment arrives to bring it into action ; here, it acting on the defensive, the cavalry watches its op- portunity to support the other troops, driving back the enemy, by prompt and vigorous charges, when CAVALRY, 19 these are hard pressed ; or, if on the offensive, biding its time, to rush upon the assailant, and compU'te his destruction, when his ranks commence to waver or show signs of disorganization from the assaults of the other arms. 20. Fomnrttion. — Thohabitual formation of cavalry for the attack isn ia line of two ranks, with a reserve or support to its rear. The supports are indispensa- bly requisite to guard against those chances of danger to which cavalry is particularly exposed, if attacked in turn, whfn in a state of partial disorganization, after a successful charge, or when threatened by an offensive movement against its flanks. The supports offer a safeguard gainst either of these dangers ; for, if the front line is brought up by the enemy, after a successful charge, it can retire and rally in the rear of the supports ; and if the enemy makes a movement against the flanks, the supports placed behind them and in column, can form and anticijinte the enemy's charge. For the foregoing reasons, cavalry should not give way to a headlong pursuit after a successful charge, unless its supports are at hand ; and, in cases where a charge is made without supports, a portion only should engage in pursuit, the rest being rallied to form a support. 21. Cavalry is seldom called on to use firearms. When on out-post service, or acting on the defensive on ground unfavorable to charging, a portion of the force may be dispersed as flankers, to hold the enemy in check b}^ their fire. In this case their movements are regulated in the same wav as other skirmishers. 20 CAVALRY. 22. Defence. — The defensive qualities of cavalry lie in the offensive. A body of cavalry which waits to receive a charge of cavalry, or is exposed to a fire of infantry, or artillery, must either retire or be des- troyed. The essential quality of cavalry renders its services invaluable in retreats where the enemy pur- sues with vigor. In such cases it should be held in constant readiness to take advantage of every spot favorable to its action, and, by short and energetic charges, force the eneni}- to move with circumspec- tion. 23. AiiacV Against Infantry. — So long as infantry maintains its position firmly, particularly if the ground is at all unfavorable to the movements of cav- alry, the chances are against a successful attack by the latter. Cavalrj- should therefore either wait patiently until a way is prepared for its action, by a fire of artil- lery on the enemy's infantry; or until the infantry has become crippled and exhausted by being kept in action for some time; or else, watching its opportu- nity, make a charge whilst the infantry is in motion, so as to surprise it before it can form to receive the attack. Cavalry should direct its charge on that point of the enemy's infantry where it will itself be exposed to the least column of fire. If the infantry is in line, the charge should be made on one of its flanks; if in square, on one of the angles of the square; and when several squares are formed, so as to afford mutual support by their fire, selecting the squares on the flanks as most vulnerable, from their position. CAVALRY. 21 24. The formation usually recommended for charg- ing against squares, is that of three squadrons in line at double distance; the leading squadron being fol- lowed by the others, either directly in its rear, or else the squadrons may be formed in echelon, success- ively overlapping each other by about the front of a platoon. The angle of the square is charged by each squadron in succession, if the charge of the one pre- ceding it fails, the repulsed squadrons each wheeling to the right or left, on retiring, to leave the way clear for its successor. A fourth squadron in column fol- lows those in line, to surround the square and make prisoners if it should be broken by the charge. 25. To draw the fire of the infantry before charg- ing, a few skillful flankers may be thrown forward, to open a fire on the square. Stratagem may also bo tried, by moving along the front of the infantry, at some 400 paces, and then charging, if it is tempted to throw away its fire at this distance. In an attack where several squares are in line, if one fires to second another, it should be instantly charged. 20. Attack Against Artillery.— In attacks against artillery, the detachment of cavalry should be di- vided into three bodies — one-fourth of the detach- ment being charged with carrying the guns, one-half to attack the supporters of the battery, and the re- maining fourth acting as a reserve, to cover the par- ties in advance from an off'ensive movement against their flanks or rear. The party to secure the guns make their attack in 22 ARTILLERY. dispersed order, and endeavor to gain the flanks of the Lattery. "When the battery has a fair sweep over the ground along which they must advance, they should, by manoeuvring and false attacks, try to con- fuse the artillerists, and draw their fire before making their charge. The attack against the support of the battery will be directed in the usual manner — the party ma- noeuvring to gain their flanks. ARTILLERY. 27. Position. — The manner of placing artillery, and its employment, must be regulated by its rela- tive importance under given circumstances, with respect to the action of the otlier arms. In the defensive, the principal part is usually as- signed to the artillery; and the positions taken up by the other arms will, therefore, be subordinate to those of this arm. In offensive movements, the reverse generally obtains. 28. Defence. — In defensive positions the security of the batteries is of the last importance. Unless the batteries are on points which are inaccessible to the enemy's cavalry and infantry, they must be placed under the protection of the other troops, and be outflanked by them. As in the defensive, we should be prepared to re- ceive the enem}^ on every point ; the batteries must be distributed along the entire front of the position occupied, and on those points from which they can ARTILLERY. 23 obtain a good sweep over Iho avcnufs of approach to it, the guns being masked, when the ground favors, from the enemy's view, until the proper moment ar- rives for opening their fire. 29. The distance between the batteries should not be much over 000 paces, so that by their fire they may cover well the ground intervening between them, and afford mutual support; the light guns being placed on the more salient points of the front, from their shorter range and greater facility of ma- noeuvring; the heavier guns on the more retired points. Guns of various calibre should not be placed in the same battory. A suflScient interval should also be left between batteries of different calibre, to prevent the enemy from judging, by the variations in the effect of the shot, of the weight of metal of the batteries. Those positions for batteries should be avoided from which the shot must pass over other troops to attain the enemy; and those should be sought for from which a fire can be maintained until the enemy has approached even within good musket-range of them. Where the wings of a position are weak, batteries of the heaviest calibre should be placed to secure them. 80. A sufiicient number of pieces — selecting for the object in view horse-artillery in preference to any other — should be held in reserve for a moment of need, to be thrown upon any point where the en- :24 ARTILLERY. «my's progress threatens danger, or to be used in •covering the retreat. 31. The collection of a large number of pieces in a .single battery, is a dangerous arrangement, particu- larly at the outset of an engagement. The exposure of so many guns together might present a strong in- ducement to the enemy, to make an eifort to carry the battery, a feat the more likely to succeed as it is difficult either to withdraw the guns or change their position promptly, after their fire is opened; and one •which, if successful, might entail a fatal disaster on the assailed, from the loss of so many pieces at once. 32. In all defensive positions, the ammunition should be most carefully husbanded. A fire should never be opened until the enemy is within good range ; and when once opened^ be continued with perseverance and coolness up to the last moment in -which it can be made effective. 33. Attack. — In the outset of oflfensive movements, .good positions should be selected for the heaviest pieces, from which they can maintain a strong fire on the enemy until the lighter pieces and the columns of attack are brought into action. These positions should be taken on the flanks of the ground occupied by the assailant, or on the centre, if more favorable to the end to be attained. In all cases, wide inter- vals should be left between the heavy batteries and the other troops, in order that the latter may not suffer from the return fire which the assailed will probably open on the batteries. Tor the same reason, care should be taken not to place other troops behind POSITIONS . 25 a point occupied b}^ a batterj-, where they would be exposed to the return fire of the assailed ; when this cannot be avoided, the troops should be so placed as to be covered by any undulation of the ground, or else be deployed in line to lessen the effects of the shot. 34. The artillery which moves with the columns of attack, should be divided into several strong bat- teries, as the object in this case is to produce a deci- sive impression upon a few points of the enemy's line, by bringing an overwhelming fire to bear upon these points. These batteries should keep near enough to the other troops to be in safety from any attempts of the assailed to capture them. Their usual positions will be on the flanks and near the heads of the columns of attack, the intervals between the batteries being sufficient for the free manoeuvres of the other troops in large bodies. The manoeuvres of these batteries should be made with promptitude, so that no time may be lost for the action of their fire. They should get rapidly over unfavorable ground to good positions for firing, and maintain these as long as possible, detaching, in such cases, a few pieces to accompany the columns of attack. Irk all the movements of the batteries, great care should be taken not to place them so that they shall in the least impede the operations of the other troops. C CHAPTER II. POSITIONS. 35. Among the most important modern additions to the military art, is that of topography, or the study of the natural features of positions, with a view to turn them to account in the first dispositions for battle, and its various succeeding phases. 36. It is only by this study that the coup d'ceil militab^e, or the art of disposing troops in harmony with the ground on which they are to act, can be brought to any high degree of perfection, whatever may be the natural gifts of the individual. 37. This study is not altogether of modern origin. Among the ancients, some of the Greek generals have given evidence of a feeling of its importance, as in the examples of Epaminondas, Xenophon, Alexander, and particularly of Philopcemen. The Komans, although having adopted an order of battle which lent itself better to varied features of ground than that of the Greeks, still showed but little knowledge of this branch, until after the wars with Pyrrhus, when the art of Castrametation underwent some change with them. 38. The tactics which grew out of the French POSITIONS. 27 Revolution gave to topography great prominence; and no general perhaps has ever displayed more con- summate attainments in this respect than Napoleon, whose descriptive memoirs — particularly of the Alps — are considered as models for all graphic writings, presenting with clearness and comprehensiveness, a picture that the mind's eye cannot fail to seize, 39. The term position is applied to any ground taken up by a body of troops either to make, or to receive an attack. 40. To select a position understandingly, an officer must possess a thorough practical knowledge of the tactical combinations of the different arms, their re- spective qualifications for the offensive and defensive, and of the adaptation of ground to their particular manoeuvres. 41. In choosing a position, the ground must be ex- amined not only with respect to its peculiar suitable- ness to the object in view, but also with reference to the influence of that in its vicinity upon this object. 42. The first point to be looked to is the extent of the position. This should be such that, deduction made of the advanced posts and of the reserve, its front and flanks shall present an unbroken line of troops, from which a close and well-sustained fire can be brought upon all points by which these can be approached. In estimating the front of a position, an allow- ance of about 180 yards may be made for each bat- talion, from 600 to 700 strong; about GO yards for 28 POSITIONS. each squadron of horse of 48 files, the necessary in- tervals between these units being ineludod in this estimate; and from 12 to 20 yards for the interval between the pieces of a battery. In estinijiting the depth, an !ilK)wance of GOO to 800 yards, at least, should be made from the front to the rear, in order that the two lines and the re- serve may be posted in suitable relative juisitimis for good support. 43. The position should offer no features by which the prompt movement of troops from one point to another, for mutual support, might be obstructed. Its debouches to the front for otfensive movements, as well as those to its rear in case of retreat, should be ample. It should be beyond the ei!ective can- non range of commtinding heiglits, both on its front and flanks. 44. The flunks being the weakest points of a bod}' of troops, must be secured from being turned or at- tacked, by resting them upon some strong natural feature of the jiosition, as a river, preciitice, Sec, whieh the enemy can neitluT turn nor seize upon; or else on some point that will aflord sufficient means of prolonging the resistance to eimble rein- forcements to reach it in time, as an iiitrenehed vil- lage,* a field work, &v. AVlien the flanks cannot be secured in either of tlu'se ways, the}- must be strengthened by an accumulation of troops upon "See Chapters VII, IX, X, and XI. Mahan's Field Fortifi- CRtiou, on Intrcnchnu'nt.s, Ac, of I'ositions, &c. POSITIONS. 29 them, to offer a vigorous resistance to the enemy should he attempt an attack. 45. PosHioiis for i/ie Defensive. — When a position is taken up to maintain a strictly defensive attitude, the natural features of its front should be of a character to prevent an enemy from approjicliing in good order, and to enable the assailed to dispute with advantage every foot of ground. The enemy, moreover, should not be able to turn the position when it is unavoidably exposed to this manoeuvre, without great risk to his own safety, by an offensive movement of the assailed on his flanks or rear. 46. The manner of disposing and handling troops in a defensive position will mainly depend upon its natural features. The only rule that can be laid down is, to post the different arms upon ground best adapted to their respective tactics, and in such rela- tive positions as to afford mutual support, and not impede each other's movements. 47. The obstructions on the front and flanks of the position will be occupied by the advanced-guard, formed of light troops of each arm, if the ground is favorable to their combined action, for the pur- pose of observing the enemy and holding him in check if he makes an onward movement. 48. The main body of the infantry will occupy every point between the obstacles on which the flanks rest in such a manner tliat no intervals shall be pre- sented through which the enemy can penetrate without being exposed to a close and powerful line of fire. so POSITIONS. 49. The artillery will be placed on those points whore it can have a commanding view of the ground in advance of the position, and sweep by its fire the approaches of the enemy, both in front and flank. 50. The cavalry, posted in rear of the infiintry, should occupy ground upon which it can make effect- ive charges to support the infantry when pressed by the enemy. 51. In posting troops on obstructed ground, care should be taken not to place them on points where they can only be idle spectators of the combat, either from the impossibility of their being ap- proached by the enemy, or from their not being able to join the enemy at the proper moment. In like manner, those points should be avoided where, from obstacles in their rear, the safety of the troops might be compromised in case of retreat. When- ever it becomes necessary to dispute the possession of the latter class of points with the enemy, the avenues to the rear must be occupied by detachments of suitable strength, to secure the retreat of the troops in advance. 52. In order that the necessary manoeuvres may be promptly executed, without confusion, and to avoid offering a mark that might attract the enemy's fire, and occasion useless exposure, no more troops should be placed on any point than its defence may indis- pensably require; and whenever it becomes requisite to strengthen a weak point, by an accumulation of troops upon it, every advantage should be taken of the undulations, or other accident of the ground, to POSITIONS. 31 mask them from the enemy's fire until the moment arrives for bringing them into action. 53. The vaUie of obstacles, as supports for the flanks, or as obstructions in the front, or rear of a position, is altogether relative, and depends on the number of troops. A very slight obstacle on a flank, which will serve to hold the enemy in check but a few minutes, may answer all the purposes of a small body of troops, by enabling them to make such changes in their dispositions as the nature of the case may call for ; whereas a large body, under like cir- cumstances, might be overwhelmed on their flank before they could make suitable manoeuvres to prevent it. A broken, obstructed country to the rear, pre- senting few and narrow avenues of retreat, might be fatal to a large body of troops forced to retire in the face of an enemy ; whereas, to a small body, the same features of ground might present many points where strong positions could be momentarily taken up to hold the enemy in check, and force him to pursue slowly and circumspectly. 54. When it is found that the enemy is moving upon the position, the advanced-guard makes suitable dispositions to hold him in check, by occupying with its skirmishers all the obstacles in its front and flanks ; when forced to retire upon the main position, these troops concentrate more and more as they approach it, taking care not to mask the fire, or impede the action of the main -body. 55. The artillery will only open its fire when the enemy is within a destructive range; it will then con- 32 POSITIONS. centrate its efforts against the columns of attack ; not replying to the fire of the enemy's batteries, unless it becomes urgent to do so, from their effects upon the other troops. The artillery will maintain its posi- tions with pertinacity, as long as possible, watching its opportunities, during the different phases of the action, to support and succor the other arms; as, for example, when it becomes necessary to replace the front line of infantry by the reserve, to advance the cavalry, when the other arms are obstinately disput- ing a decisive point, or when the enemy abandons the attack. The great mobility of field-artillery, owing to more recent improvements, places it in the power of this arm to act with great boldness in sup- port of the others. The ground over which the guns may be required to move, for this purpose, should be well examined, before the attack commences, by the officer commanding the artillery, that no delays may occur in bringing them into action upon the proper point at the proper moment. 56. The main-body of the infantry should not open its fire until it can be thrown in with deadly effect. If the enemy, unchecked by the fire, still pushes for- ward, he must be met by a charge, either in line, or column, from the point menaced; a portion of the reserve immediately closing the interval left by the troops making the charge. 57. The reserve should not be brought into action unless its co-operation is indispensable for obtaining some decisive result; as forcing the enemy back from some important point from which the main-body has POSITIONS. 33 "been compelled to retire, or covering the retreat o the main-body, until it can rally and form again in the rear. 58. The cavalry must be in readiness, from its position, to act promptly, either against any attempt upon the flanks of the infantry, or to profit by any faults, or disorder of the enemy. If the enemy throws forward small detachments without suj)port- ing them properly, or advances his main line without securing his flanks, or shows symptoms of confusion in his infantry, the opportunity should not be lost by the cavalry. In all movements of the infantry, either in advancing or retiring, the cavalry should be at hand to cover it from a sudden attack. 59. If the enemy is beaten off, pursuit is made, either by the cavalry or by detachments of infantry, according to the features of the ground, whilst the main-body is promptly rallied, and placed in position to receive the cnem}' should the attack be renewed. 60. The dispositions for a retreat will depend upon the circumstances under which it may be made, ^hen the troops retire by successive lines, the greater portion of the artillery should always be in the line nearest the enemy, and between the battalions ; the remainder being in the second line, ready to repulse any flank attack. The cavalry is posted in the rear of the second line, either upon one, or both wings, to be in readiness for a charge at any moment. 61. "When the entire force moves oft' together, the rear is secured by a rear-guard of the best troops, composed of one or several arms, as the circumstances 34 POSITIONS. of the ground may require. The rear-guard will profit by the features of the ground to check the enemy, but will be careful not to lose time, by pro- longing unnecessarily the resistance on any point, as this might bring the main force of the enemy upon it. 62. Great circumspection should be shown in retreating through obstructed ground, in watching the enemy's movements on the flanks, and in timely securing defiles leading to the rear, to prevent the enemy from cutting off the retreat. 63. Attack. — An enemy may be made to abandon a defensive position, either by driving him from it, or by manoeuvring to turn it, and so force him to fall back to secure his line of communications. In attempting the latter plan, it should not be forgotten that the assailant is, to a greater or less degree, exposed to the same danger as his adversary, who, if active and enterprising, may turn the tables on him- The celebrated battle of Eivoli, in which a portion of the Austrian force turned the flank of the French position, and was there obliged to lay down their arms, — Napoleon, using on that occasion, when these troops were discovered in his rear, one of those mag- ical expressions, '■'•Those are o^«•s," b}'' which he so well understood how to electrify the soldier, — is a remarkable example on this head. The battle of Buena-Vista, where the Mexicans, after turning the flank and gaining the rear of our troops, barely escaped a similar fate, is another; whilst that of Cerro-Gordo is as remarkable for the masterly and POSITIONS. 35 admirable manner in which the enemy's position was turned and carried, although resting upon ground which was fairly deemed impracticable by him, 64. In planning the attack of a position, attention must, in the first place, be directed to those points in which its main strength resides, and for this reason termed the key-points, the loss of which will force the assailed to retire. As the assailed will probably put forth all his efforts to maintain these points, their attack will demand corresponding exertions on the part of the assailant, and should be made only with troops of the best character. 65. In the second place, those points must be care- fully examined, which, by their fire, flank the posi- tion, as an advance upon its front cannot be made without great losss and hazard of success until the assailed is dislodged from them. 66. Finally, points which are weak, either from the features of the ground, or from a faulty disposi- tion of the troops; as approaches which are badly swept by the fire of the assailed; an exposed flank with too few troops; or a point where they are not properly placed for mutual support. 67. The main effort of the assailant is seldom directed against more than one point of the position ; that one being usually selected which, if carried, will lead to the most decisive results; as, for example, one of the flanks, when not resting upon any strong- obstacles. But the main attack is always combined with demonstrations upon some other point, both with a view of deceiving the assailed as to the real S6 POSITIONS. point of attack, and to prevent him from withdraw- ing troops from other points to strengthen the one menaced. • 68. These demonstrations, or false attacks are, in some cases, made h^^ the advanced-guard of the assail- ant, after driving in that of the assailed; in others, by a special detachment. In the latter case, the detachment should seldom exceed a fourth of the entire force, and should be composed of troops of each arm, both for its own safety against any offensive movement, and to present to the assailed a likelihood of danger. 69. The advanced-guard, composed of light troops of each arm, commences the attack, by driving in the iidvanced posts of the assailed, keeping within sup- porting distance of the main-body, and occupying such points as may be necessary to cover its manoeu- vres, or to secure its retreat in case of failure. If a reconnoissance of the position has not been previously made, it will be effected under cover of the move- ments of the advanced-guard. 70. The artillery takes position where it can silence the batteries of the assailed, and prepare the way for the advance of the other troops. The infantry is usually formed in two columns for the real attack; the leading column being sometimes preceded by an advance. A part of the artillery advances either in one body, or echelon, on the flank of the column of attack, the leading section preceding, by about a hundred paces, the head of the column of attack. If the column of attack deploys to open its fire, the POSITIONS. 37 artillery moves to one of its flanks and seconds it by a fire of case shot. If the column charges with the bayonet, the advanced portion of artillery retires to the position of that in the rear, to be ready to cover the infantry by its fire, if the attack fails. The cav- alry follows in the rear of the infantr}^ to secure its flanks from any offensive movement, and to hold the assailed in check, should he attempt a pursuit after beating off the infantry. 71. If the attack is successful, the artillery and the greater portion of the infantry are immediately formed in good order, to be in readiness for anj- emergency, the pursuit being left to the cavalry and some detachments of infantry. In case of failure, the troops engaged fall back under cover of those in their rear ; the artillery, by a well-directed fire, and the cavalry by opportune charges, holding the enemy in check, until order is re-established in the retiring troops, as a preliminary to a retreat, or to a renewal of the attack. 72. Pos'itmis in Obstructed Ground. — This term may bo applied to localities where the ground, al- though level, is cut up by ditches, hedges, broken roads, «&c., which obstruct the free movement of troops. 73. Positions of this character are more favorable to the defensive than the offensive. As, from the nature of the case, connected movements are, for the most part, impracticable, the commander will find it difficult to direct the engagement, and must rely 38 POSITIONS. upon the judgment and skill of his subordinates for its successful issue. 74. The general disposition of the troops will be in dispersed order. There will be but few opportu- nities for the action of cavalry ; and the artillery- can seldom find positions to act in mass. The light cavalry and light pieces may be placed in front, wherever they can act with advantage, and support the infantry. The supports and reserves should be kept well to the rear of the troops engaged, to be ready to meet the enemy, should he attempt to turn the flanks — a manoeuvre to which obstructed ground is frequently favorable. The heav}' cavalry and heavy artillery take post to the rear, at any point which may offer a good position to cover the retreat. 75. The attack, like the defense, will be mainly conducted by the infantry and some light pieces, the infantry acting as skirmishers, and the artillery being employed to force any opening that may offer for the advance of the infantry. Whenever the ar- tillery gets a good position, it should endeavor to keep it as long as practicable. The cavalry can effect but little, as the enemy's, even if inferior in strength, may watch its opportunities, from behind obstacles, to make short and successful charges. The artillery not in action will occupy the roads at points to the rear most suitable for covering the retreat, if the attack fails. 76. In positions of a mixed character, presenting alternations of open and obstructed ground, the troops POSITIONS. 39 on the defensive must guard with great care every accessible point at which the assailant can dthouclie from the obstructed upon the open portions. A strong fire of heavy artillery should be brought to bear upon these points; and cavalry should be posted in places where they can be masked from the enemy's fire, and be at hand to charge the assailant, as he at- tempts to dlhouchc. These efforts should be seconded by the bayonets of the infantry, if a favorable op- portunity occurs. 77. The obstructed ground to the rear must be strongly occupied, to secure the retreat, by posting light troops under the cover aftbrded by the skirts of woods, by ditches bordered with trees and hedges, &c.; and advantage must be taken of every small de- file, to dispute the ground inch by inch. 78. In the phases of engagements in positions of this character, the defense must frequently be accom- modated to the troops at hand, as in the confusion of the most orderly retreat, in such cases, it is im- practicable to preserve that connection between the movements of the different arms which would be best for mutual support. If the assailant, by discon- nected movements, or a disorderly pursuit, laj's him- self open to an attack, it should be made and pressed with vigor, or not at all. 79. In the attack of mixed positions, the supports and reserves should be kept well to the rear, whilst the troops are engaged in the obstructed portions, to guard against oftensive movements on the flanks by the assailed. Those engaged should close in as the 40 POSITIONS. ground opens, to prepare to dhhouche upon it in force, in ■which operation the infantry must be covered by the cavalry and artillery. In advancing upon the obstructed ground, the waj- must be prepared for an attack with the bayonet, by a heavy fire of artil- lery, directed particularly upon the most accessible points. Operations of this character demand extreme pru- dence and forethought. Every forward movement must be made with great caution ; every point gained must be well secured, and its possession disputed with tenacity if the assailed attempts to repossess himself of it. In no other way can the troops engaged be kept well in hand, and be prevented from the confu- sion and danger of a hasty pursuit. 80. Positions in Forests. — In occupying a forest defensively', the skirts and the openings to it, as roads j &c., must be strongly guarded by a line of skirmishers with its supports and reserves, and by artillery so placed as to sweep in flank those points which are most accessible, as the salient portions, and the roads. The line of skirmishers, besides avail- ing themselves of the natural covers of the position, as trees, ravines, &c., will form abatis in front of the more accessible points; and the cannon, in like man- ner, should be covered by epaulments, when suitable means are at hand. 81. The main-bodj- will take up a central position, on ground favorable to the defense, covering its flanks by marshes, or other like obstacles, strength- ening, if requisite, its front by abatis ; and guarding POSITIONS. 41 all the approaches by a suitable disposition of its heavy artillery. The points of junction of roads leading to the front should be strongly occupied and strengthened, when practicable, by field-works, 82. The space between the skirts of the wood and the central position should be obstinately disputed, advantage being taken of any clearings that may oc- cur, to post light pieces and cavalry in ambush near them, to drive back the assailant, as he debouches on the open ground. 83. As cavalry can only act, under such circum- stances in small detachments, the main body of it will take position to the rear, to cover the retreat of the other troops from the forest, and check the assail- ant in debouching from it. 84. The attack will be directed on the salient por- tions, and upon the entrances of the forest; first, by a heavy fire of artillery, to drive back the infantry, and force the guns of the assailed to retire. This will be followed up by a rapid attack in line, with the bayonet on those points, whilst demonstra- tions are made against the others occupied by the assailed. If the attack with the bayonet succeeds, the troops must secure the points seized before pushing for- ward in pursuit, placing some cannon and troops at the most suitable points, to cover the retreat, should the assailed make a strong oflfensive move- ment. 85. The pursuit should be made firmly but cau- tiously, the skirmishers leading and rooting out the D 42 POSITIONS. assailed from every strong cover ; some field-pieces and 'a column of infantry, each secured by skir- mishers on their flanks, following upon the main road with a detachment of cavalry well to the rear, but within supporting distance, to act according to the emergency. 86. If the assailed makes a firm stand at his cen- tral position, an attack upon his front will not only be bloody, hut of doubtful success ; an attempt should therefore be made to turn his flanks, whilst he is occupied in front by demonstrations and false attacks. If the assailed retires, the pursuit will be made by some light pieces, followed by the infantry and cav- alry, the difl^erent arms being employed according to the varying circumstances of the ground. 87. Positions iji Mountains. — The best and only safe system of defense in mountainous positions is to occupy with the main-body a central point, at which the principal passes meet, and be always in a state of readiness to act off'ensively against the enemy, on whatever point he may advance, throwing forward strong detachments in the principal passes to observe the enemy, and offer a vigorous resistance, in order to force him to develop his plan of attack. So soon as it is ascertained on what point the principal force of the enemy is concentrated, the main-body will advance from the central position to a point where it will be secure from a flank attack, to act offen- sively. The detachments on the other passes will act POSITIONS. 43 on the flanks of the enemy by cross-roads, if they can do so, or will try to fall on his rear. 88. When circumstances constrain to a passive de- fense, a position must be taken up cither across or along the valle}-, which will best secure the flanks, and cover the line of communication. 89. The attack in mountainous positions is con- ducted on the same principle as the defense. The assailed must be threatened on every point, by throw- ing columns into the several passes, whilst the main- body advances along one of the principal lines. If the assailed maintains a strict defensive, the several columns unite and make the attack ; if he assumes the offensive, the principal columns must be rein- forced, and an attempt be made to throw detach- ments on his flanks and rear, to force him to fall back. The flanks of the troops in column, advanc- ing in the valleys, must be covered by detachments of skirmishers on the heights. 90. The attack will be made mainly by the in- fantry, as skirmishers. A strong line of fire must be maintained with great pertinacity; the supports must be kept well to the rear ; the reserve and main- body holding the points of junction of the roads leading to the front, and not advancing until the en- gagement is well under way. Great prudence must be shown in advancing, as the troops engaged are liable at any moment to an attack on their flank. If the assailed attempts this manoeuvre, the line of skirmishers must hold on per- tinaciously to the ground gained, whilst the supports 44 POSITIONS. •display and keep the enemy in check, until the re- serves can be brought up to repel the attack with the bayonet. As the line of skirmishers force back the assailed, the main-body follows in column along the valley, its flanks being secured by skirmishers on the heights. If opposed by the assailed, the main -body must attack with vigor, to carry its point promptly, as those engaged in front have no chance of being relieved. 91. There is here seldom any field of action for cavalry ; the main portion of this force will there- fore be kept to the rear, occupying the points of junction of the passes. Small detachments of dra- goons may occasionally do good service in front, making charges, or fighting on foot, as the opportu- nity ofi'ers. 92. The artillery can seldom find positions ofi" the roads. A few light pieces, which can be placed in position on the heights and be well served, may fre- quently produce very decisive results. When it is necessary to open a way for the main-body to ad- vance, at points of peculiar strength, it should be done by the heaviest pieces. The horse-artillery will usually be attached to the troops charged with making a demonstration on the flanks of the enemy's posi- tion, through the secondary passes. 93. As the assailed will probably obstruct the passes by abatis or other obstacles, a detachment of engineer troops should accompany each column, being kept always at hand to clear away the ob- structions. POSITIONS. 45 94. Positions near Rivers. — Positions may be se- lected near rivers, either for the defensive, to pre- vent an enemy from passing, or for the offensive, to force a passage. ^ 95. A position for guarding a river should be se- lected at some central point, from which the troops can be rapidly marched to oppose the enemy wher- ever he may attempt to cross. Small posts are established along the course of the river, at the most suitable points for observing the enemy, and communicating to the rear intelligence of his move- ments. So soon as it is known that a decided attempt is to be made at any point, the cavalry, with some bat- teries of horse-artillor}', will move to oppose it. If, on reaching the point, it is found that the enemy has succeeded in throwing over a portion of his forces, they must be vigorously attacked by successive charges of cavalry, and by a persevering fire of the artillery. If the ground is obstructed so that the cavalry cannot charge, the dragoons should dismount and act as skirmishers. Positions should be selected by the artillery, where it can take that of the enemy on the opposite bank in flank, the object being to si- lence it or to draw off its fire, to enable the cavalry to act. Everything here depends on lengthening the affair, and preventing the enemy from reinforcing the troops that have passed, until the main-body can arrive from the central position, to support the cav- alry and artillery engaged. 96. The passage of a river in the face of an enemy 46 POSITIONS. is an operation of extreme difficulty, and every means should therefore be employed to deceive the enemy and draw off his attention from the point selected for the passage. The bridge-train and other requisites being in a state of readiness, the night- time is selected as most favorable to a successful issue. The point selected to pass a river in the face of an enemy, should combine several properties, as a posi- tion, to give the assailant a decided advantage over the assailed. The river at this point should be nar- row, so that the bridge may be rapidly constructed; the banks should form a bend towards the assailant, to enable him to plant his batteries in a position to concentrate their fire on that part of the ground on the opposite bank where the troops must form, care being taken that these batteries are not exposed to enfilading fire from those assailed, within the proper range for this fire; the ground near the landing place on the ojiposite shore should present covers, in order that the troops passed over in boats, before the bridge is ready, may not be exposed to the artillery and cav- alry of the assailed, and may be enabled to maintain their position until reinforced by the main-body. If there are islands near the point of landing, from which a fire of artillery and infantry can be brought to bear on the assailed, they should be occupied by infantry and some field-pieces, particularly if they are wooded, or offer other covers. 97. In moving upon the point, silence and perfect order should be preserved throughout. Batteries of POSITIONS. 47 the heaviest guns are placed at the most suitable points, to bring a converging fire to bear upon the approaches to the landing on the opposite shore. Light troops are thrown over in boats, to occupy the ground in advance of the landing, which troops, if discovered by the advanced posts of the enemy, should bo rapidly reinforced. So soon as the bridge is ready, an advanced-guard, composed of troops of all arms, will pass and take position, to cover the formation of the main-body. The advanced-guard will mainly keep on the defensive, acting with great prudence, not to oflfer any advantage to the enemy, its task being to gain time for the rest of the forces to pass. 98. The, order in which the main-body should pass must be regulated by the character of the ground and the resistance oflTered by the enemy. Usu- ally, a portion of the heavy guns follow the ad- vanced-guard, and take position to check the enemy ; and these are followed by the main-body of the in- fantry, the main-body of the cavalry with its bat- teries of horse-artillery passing last. In other cases, it may be best to throw over the cavalry and horse- artillery before the other troops. 99. The task imposed upon the batteries of cover- ing the passage, is of the greatest moment. Careful attention should be given to the management of their fire, directing it, in all cases, upon that portion of the enemy's force whose presence is most threat- ening. 100. A retreat across a river, when pressed by the 48 POSITIONS. enemy, is of all operations the most difficult, and re- quires every auxiliary means to save the retreating force from destruction.- The point selected for the passage should have the same requisites as one for the offensive, and its natural strength should be in- creased by field works, in order that the enemy may be kept from pressing too hotly upon the rear of the troops that pass the last. In a retreat of this character, all the usual strata- gems for deceiving an enemy nxust be resorted to be- fore commencing the movement, so that time suffi- cient may be gained for making the necessary dispo- sitions to secure the point of passage, as well as to gain a march or two in advance. The heavy artil- lery should be dispatched at an early moment to the rear, to take a position on the opposite shore, for covering the passage. The rest of the force, cov- ered by a strong rear-guard, formed of the best troops, will effect their passage generally in an in- verse order to ihat followed in one for the offen- sive. One of the worst dangers to be guarded against is the confusion caused by hurry. To avoid this, the arrangements for the march of the different bodies should be made with the greatest care, so that each may reach, at the proper moment, the point of passage. CHAPTER III. ADVANCED-GUARDS AND ADVANCED-POSTS. 101. To keep an enemy in ignorance of the state of our forces and the character of our position is one of the most indispensable duties in war. It is in this way that we oblige him to take every possible precaution in advancing ; forcing him to feel his way step by step, and to avoid risking his own safety in hazarding those bold and rapid movements which, when made against a feeble or an unprepared enemy, lead to the most brilliant results. 102. This object is effected by placing between the position occupied by the main force and the presumed direction of the enemy, a body detached from the main force, but acting always with reference to it, termed an Advanced- Guard. This term is used for any body of troops so separa- ted from the main-body, whatever its strength and composition, and whether the troops be in position or on a march. 103. For a large force, the advanced-guard is ne- cessarily composed of troops of all arms, its strength being proportioned to that of the main force ; — the more or less resistance of an independent character it maybe required to make; — and the greater or less 50 POSITIONS. extent it may be found necessary to embrace by its advanced-posts, on the front and flanks, to watch and anticipate every movement of the enemy. The proportion of the advanced-guard to the main- body may vary from a third to a fifth of the total force. In armies of some strength, or large corps-(V arniee, particularly where the nature of the country requires a wide development of advanced-posts, the larger proportion is demanded ; as at least one-third or even one-half of its strength will be required for the advanced-post service. In a small force of two or three thousand men, one-fifth will usually be all that can be well spared for the same purposes. 104. Our purpose, in all cases, should be to keep the enem}'- in a state of uncertainty as to our actual force and movements, and this can be eflfected only by keeping constantly between him and our main- body a force of sufficient strength to offer an obstinate resistance, if necessary, to every attempt he may openly make to gain information, and even to act ofFensively against him, when occasion offers, so as to keep him in doubt as to the actual character and number of troops before him ; the old military axiom being always kept in mind, that " a swot^d opporttme- ly draron fr^equently keeps another hack in its scabbard." 105. In all defensive positions, the advanced-guard and its advanced-posts should retire slowly but cir- cumspectly, so that the main-body npy have time to take all its defensive measures. In the offensive, the attack of the advanced-guard should be decided and vigorous; pressing upon the enemy at every point, rosiTiONs. 51 and leaving nothing undone to demoralize him, by the confusion which so often follows from an impetu- ous onset. 106. AVhilst in position, the advanced -guard should take advantage oi the natural, or other obstacles on its front and flanks which are within supporting dis- tance, to strengthen itself, and gain supports for its advanced-posts. In this way, its means of resistance, whether acting offensively, or otherwise, may be greatly augmented. Ground of this character, taken up by the troops, should not be abandoned without very cogent reasons for it ; since, should circumstan- ces bring about a forward movement, it might cost more to regain what was given up than to have main- tained it obstinately at first. 107. The ground to be taken by an advanced-guard, and embraced within its advanced-posts, should be carefully chosen. To take position where the move- ments of the enemy can be well watched, whilst our own troops are kept concealed, and not liable to a sudden attack, either in front or flank, are the desid- erata in such cases. If, in following this guide, it should lead to a development of advanced-posts which would be too weak at any point for a tolerable resist- ance, there remains but the alternative to retire slowly before the enemy, — taking care that he do not slip behind the out-posts and their supports, — ujDon some central point to the rear, where the advanced-posts, united to the troops in reserve, may make a good stand, and from which, if the chances are favorable, 52 POSITIONS. they may advance upon the enemy, and make him pay dearly for his temerity. 108. In all affairs of advanced-guards great circum- spection is to be shown, both by ttie officer in com- mand of the advanced-guard, in throwing forward fresh troops to strengthen a point assailed, as well as on the part of the general-in-chief, in sustaining the advanced-guard by weakening his main-body. These are points that can only be decided upon the spot. The safer rule, in all cases, is not to weaken the main defence, or main attack, by detaching from it, to sup- port a feeble point. If the force engaged, under such circumstances, does not suffice for its own defence, it is best for it to fall back in time, and, taking position with the main body, endeavor, by their combined efforts, to turn the scales of victory in their favor. 109. The duties of advanced-guards being so much more frequently to feel and occupy an enemy, pre- paratory to some decisive blow by the main body, than to engage him with a view to follow up any advantage gained, it follows, as a matter of course, that they should be composed of the most efficient and active light troops at the general's disposal. Such troops, in the hands of a bold, energetic, but prudent leader, will be the right arm of an army. Prompt on all occasions, never taken at fault, they keep the enemy constantly occupied, harrass him with fatiguing precautions to secure his flanks and rear, whilst their own force is kept relieved from these annoyances, and always fresh for any great emergency. POSITIONS. 63 110. Advanced Posts. — The duties of the advanced posts are the same whether the troops are stationary, or in movement: they are, 1. To keep a good look- out for the enemy, and when in his immediate pres- ence to take all means to be accurately informed of his strength, position and movements; 2. Should the enemy advance, to hold him in check long enough to give the main body ample time to be prepared for his attack. 111. By a faithful discharge of these duties, the whole army can, at all times, and under all circum- stances, be kept in a state of readiness for action, without subjecting the soldier to any fatigue beyond the ordinary physical endurance of a well-developed .manhood, as but a small portion, comparatively, of the forces present is required to watch over the safety of the rest, and can therefore be frequently relieved, so that every one may have time sufficient for the repose demanded after extraordinary exertions. 112. The object being to secure the front and flanks of the position, occupied by the main body, from any attempt either to reconnoitre, or attack it, the detach- ments which form the advance posts must be so dis- tributed as to embrace all the avenues by which the enemy can approach the position. The system adopted, in most services, to effect this object, consists of two or three concentric lines of posts, disposed in a fan-shaped order. The exterior line, which forms the Old-Posts, embraces a wide circumference, and by means of a chain of Setiilnels, posted in advance. 54 POSITIONS. prevents any one from penetrating to the rear between the posts, without being seen. 113. The second line, which is one of Gi^and- Guards, embraces a narrower circumference than the line of out-posts, occupying the more important avenues from the out-posts to the interior, so as to be in posi- tion to support the out-posts in case of necessity, and to receive them if driven in, 114. The interior line consists of several strong detachments, termed Pickets, posted upon the main avenues to the position. They serve as supports to the two exterior lines, upon which they rally if forced to retire before the enemy. 115. Besides these dispositions for security, Pa- . iroles are kept up between the line of posts, to keep the one informed of the state of the other ; and also between the out-posts and chain of sentinels, to see that the duties of the latter are well performed, and to search any ground not brought well under the eyes of the sentinels. The whole, in this way forms a connected system, for observing the enemy and for mutual support in case of attack, 116. The duties of the out-posts, and of the grand- guards which form their supports, are strictly those of observation. If attacked, they offer no resistance farther than to enable them to feel the enemy per- fectly, and never lose sight of him. The task of holding the enemy in check by a vigorous resistance, so as to procure sufficient time for the main body to make its dispositions for battle, is consigned to the pickets. PosiTiO]srs. 55 117. Tlio ground taken up by the advanced-posts will depend on the capabilities which its natural fea- tures offer for defence, on the number and character of the approaches it presents to an enemy for attack- ing the front, or flanks of the position occupied by the main body, and upon the facilities it may afford for communication between the posts. 118. Out-Posts. — The position of the out-posts, with respect to the main body, will be regulated by the more or less broken character of the country. As a general rule, the moan distance may be taken at about two miles. The line occupied by these posts should take in all the approaches to the front and flanks of the main position. When a position is to be held for some time, or is taken up after a battle, the out-posts may be thrown farther in advance, to procure greater repose and security for the main body. 119. The ground on which the line of outposts is established should be carefully examined, with a view both to observation and defence. As far as practica- ble, those points should be selected for posts which pre- sent some natural advantages for the defence ; will screen the troops from the enemy's view,- and enable them to watch all his movements. Whenever the features of the ground do not offer natural obstacles to cover the posts, artificial means of a slight charac- ter should be resorted to. The flanks of the line should rest upon strong natural obstacles ; when such cannot be found, without giving the line too great an extent, these points must be secured by strong pickets of cavalry or infantry, thrown back to form crotch- 56 POSITIONS. ets, from which patroles must be constantly kept up on the flanks, in the presumed direction of the enemy. 120, The strength of each out-post, and the distance from one to the other, will be regulated by the fea- tures of the ground, and the number of sentinels or vedettes that each post must throw out. The posts should, as far as practicable, be within sight of the grand-guards to which they belong, and the sentinels of their respective posts. When the ground does not permit this arrangement, sentinels should be placed at intermediate points, to communicate promptly whatever may happen at the line of posts, or of sen- tinels, to the rear. Posts of infantry should not, as a general rule, be placed farther apart than 600 paces ; nor their sentinels more than 300 paces in advance of the posts. Those of cavalry may be some 1500 paces apart, and their vedettes from 600 to 800 paces in advance. The strength of each post should be calcu- lated at the rate of four men for each sentinel, or vedette. 121. Sentinels. — The sentinels and vedettes form a chain in advance, and are posted on points from which they can best watch the enemy, without being seen by, or exposed to him, in any way. As one of their main duties is to prevent any one from passing their chain, they should be so placed, with respect to each other, that they can see all the ground between their respective posts, and be able to stop any one who may attempt to pass between them. At night and in misty weather, the sentinels should be doubled and be drawn in nearer to the out-posts. ADVANCED-GUARDS AND ADVANCED-POSTS. 57 Whenever it may be deemed necessary to jiost sentinels on points beyond the line of out-posts, they should be furnished by posts detached in advance of the line. 122. &7'aml- Guards. — As the grand-guards furnish the out-posts, and serve as their supports, not more than one-third of their force should be taken for the out-posts. The grand-guards are posted on the prin- cipal avenues leading to the detachments on which they are to fall back, if driven in ; and when of infantry, about 200 paces, and of cavalry, 600 to 800 paces, in the rear of the out-posts. The points which they occupy should be selected, both to secure them from the enemy's view, and to give a ready commu- nication between them and their respective out-posts. No difficult, or broken ground, should lie between the grand-guards and their out-posts ; if any such occur, particularly if it be of a nature to offer facili- ties to an enemy to penetrate to the rear, the whole should be posted on the farther, or hither side of it> and in preference in the latter position, if by it tho chain of post can be preserved unbroken. 123. Pickets. — The main detachments or pickets, which form tho supports to the grand-guards and out- posts, occupy the principal avenues to tho position of the main body. As their duty is to hold the enemy in check, the points which they take up should be susceptible of a good defence ; such, for example, as villages, defiles, «fcc. "Whenever these advantages are not found at hand, resort should he had to any tempo- rary obstacles, as abatis, &c., which can be readily £ 68 ADVANCED-GUARDS AND ADVANCED-POSTS. procured, to place the troops under shelter. The points thus occupied should, as a general rule, be about midway between the line of out-posts and the position of the main body. 124. Small posts should be thrown forward by the pickets, between their position and the line of grand- guards ; both for the greater security of the detach- ments, and as supports to the grand-guards. In like manner, when the line of pickets is of considerable extent, intermediate posts must be established, to keep open a communication between them. 125. No pains should be spared to obstruct the approaches of the enemy to the points occupied by the pickets, particularly those which lead to the flanks, leaving open such only as will oblige the enemy to attack under the most unfavorable circumstances, and if, between the advanced posts and the main body, a defile, or other unfavorable pass should occur, which the enemy, by turning the line of the advanced posts, might seize upon, and thus cut off their retreat, it should be occupied by a strong detachment, both to prevent such a manoeuvre, and to favor the retreat on th6 main body. 126. Strength of the Advanced- Posts. — The entire strength of the advanced posts, as well as the relative strength of the pickets, grand-guards, and out-posts, will depend upon the character of the ground cov- ered by them, as being more or less open, and pre- senting more or less facilities for circumscribing the appr oachcs of the enemy to the main position. It rarely occurs that sufficient troops can be detached ADVANCED-GUARDS AND ADVANCED-POSTS. 59 to cover all the accessible ground, and perform the duties in a thorough manner. 127. The strength of each picket, and the kind of troops of which it is composed, will depend on the degree of resistance to be offered to the enemy's attack, and the character of the position occupied. In most cases, where a vigorous defence is called for, they will consist of troops of all arms, and an aggre- gate of several hundred men. The grand-guards, out-posts, and patroles, should not exceed one-third the strength of the pickets to which they belong. They will be composed of cavalry, or infantry, according to the more or less broken features of the ground. 128. It rarely occurs that artillery is placed at the out-posts. Whenever it happens that a piece, or two, may be deemed necessary, to sweep sdme passage, or defile, in advance of the line of out-posts, theguns must be protected by a strong post, to insure their safety in a retreat. 129. If, from the character of the ground, the out- posts are mainly of infantry, some cavalry should always be attached to them, to patrol in advance of the position, and to convey intelligence to the rear of what may be passing in the neighborhood of the out- posts. 130. When^the advanced posts cover an advanced- guard, the commanding officer of the whole should take a position, with his artillery and the main body of his command, at some central point, in the rear of the pickets, in order to be ready to support them if 60 ADVANCED-GTTAKDS AND ADVANCED-POSTS. hard pressed by the enemy. The choice of this posi- tion is an object of the greatest importance, as the safety of the advanced-posts, as well as that of the main body, may depend upon the degree of judgment shown in this selection. 131. So soon as the advanced-posts have taken up their stations, instructions should be given to the oflScers of the different posts, with respect to the points upon which they are to fall back, in case of being forced in, the lines of communication they must retire by, and the position they must take up, in joining the supports to which they respectively belong. 132. Duties of Office)^ commanding an Out-Post. — An officer in command of any of the out-posts must be capable of untiring vigilance and activity, to perform the various duties which devolve upon him. He should be provided with a good map of the coun- try, a telescope, and writing materials. 133. He will thoroughly reconnoitre the ground upon which he is to dispose his command, and also as far in advance as circumstances will admit, question- ing closely any inhabitant he may find. After tak- ing up his position, he should go forward, with the half of his command, and post each sentinel himself. If, however, he relieves another in the command, and deems it advisable to make any changes in the dispo- sitions of his predecessors, he should promptly report the facts to the commanding ofiicer in his rear. 134. When the officer finds that the enemy is not in his immediate neighborhood, he should endeavor to ADVANCED-GUARDS AND ADVANCED-POSTS. 61 feel his way cautiously towards him by patrols; and when in immediate presence, he should omit no means to watch the enemy's movements, and from the occur- rences of the moment, such as noises, the motion of clouds of dust, camp fires, conflagrations, «&c., endeavor to divine what is passing in his camp, and his probable intentions. 135. Accurate written reports should be promptly Bent to the oflicer in command, in the rear, on all these points. The reports should be legibly written, and should clearly, but coticisely, state what has fallen under the oflScer's eye, what he has learned from others, and the character of the sources from which his information is drawn. 136. He will particularly see that no communica- tion with the enemy be allowed, and that no flag be permitted to pass the line of post, without orders from the rear. 137. The post under the officer's command, whether horse or foot, should not all be allowed to sleep or eat at once. The horses, when watered, should be taken singly, or by pairs, and always mounted. At night, one-half of the command should be under arms, pre- pared for an attack, the other seated, their arms and the bridles of their horses in hand. The men should never be permitted to occupy a house; and if the weather is such that a fire out of doors is indispensa- ble, it should be as much concealed as practicable ; one-half only being allowed to sit near it, the other posted, at a convenient spot at hand, to fall on the enemy should he attempt a stroke. 62 ADVANCED-GtTARDS AND ADVANCED-POSTS. 138. "Wlien the position taken up is to be held for some time, it will be well to change the locality of the posts occasionally; this should be done, particu- larly at night, in a hilly district, changing the post from the brow of the hill, where the men can bes* keep a look-out by day, to the low ground at night, as more favorable to detect any movement above. 139. The out-posts are usually relieved at day-break, as being the most favorable moment for the enemy to attempt a surprise ; the new guard will serve to reinforce the old. For the same reason, the old guard should not be suffered to retire before the patrols come in, and report all safe, 140. As a general rule, no post should ever retire before an inferior force; and, if attacked by one supe- rior to it, resistance should be cautiously made with a view solely to give time to the grand-guard to be in readiness to receive the enemy. "When it is seen that the movement of the enemy is serious, the officer should draw in his sentinels as skirmishers, and retire upon the grand-guard; the latter will usually be- divided into two divisions, one of which will be sent to take up a position to the rear, to cover the retreat; the other will act as a support to the line of skirm- ishers, so as to feel the enemy. In all cases of retir- ing, whether of sentinels upon their posts, or of posts upon their supports, care should be taken to assume a direction towards the flunk of the force in rear, so as to niiniatk its front and not impede any forward movement it may make, if necessary, 141. The degree of resistance to be offered by the ADVANCED-GUARDS AND ADVANCED-POSTS. 63 pickets will depend on the object to be obtained, and the importance of the point occupied. Thej^ should not retire until they have received the whole of their grand-guards, out-posts and patrols. 142. At night the precautions should be necessarily redoubled, and every movement bo made with ex- treme caution. AVhenever any noise is heard in the direction of a sentinel's post, the officer should pro- ceed, with a part of his command, in its direction, to ascertain the cause of it. If he finds that it arises from an onward movement of the enem}^, he should only fall back upon his grand-guard when he sees that resistance would be unavailing ; retiring slowly and cautiously, and taking every advantage, which the ground offers, to check the enemy's advance. Should the enemy fall suddenly upon his command, he must endeavor to cut his way through, and reach his position in the rear by the best circuit he can find. 143. Advanced-Guards. — Measures of precaution, for a force in position, are far more easily arranged than for one in motion. At a halt of some days, but slight changes in the first dispositions, arising from a more thorough knowledge of the ground taken up, will be requisite ; on a march the scene is continually shifting, and the enemy may fall on just at that point or under those circumstances in which we are least prepared to meet him. Hence a necessity for doubling the ordinary precautions on a march, and keeping the troops more in hand, so as to be, at all moments, pre- pared for any emergency. 144. The spirit of the dispositions is the same in 64 ADTANCED-GITARDS AND ADYANCED-POSTS. both cases ; changes in the details, so as to adapt our force to the changing features of the ground passed over, present the real difficulty. On a march, we may have to guard against an attack on the head of the column, on either flank or both, and in the rear. Hence a necessary disposition of movable advanced- posts, in each of these directions, keeping pace with the progress of the main body,.and far enough from it to give it timely warning of a threatened attack. 145. The dispositions in front is termed the Ad- vanced-Guard, those on the flanks, the Flankers, and those in rear, ih.Q Rear- Guar d. 146. As the head of a colunan in march towards the enemy is the weak point, it is here that the prin- cipal strength must be accumulated, so that, if threat- ened with an attack, sufficient resistance can be offered to enable the rear divisions to come up and take timely position for battle. The advanced-guard should, therefore, be composed of troops of all arms, and be always in a suitable state of readiness to receive the enemy, according to the nature of the ground upon which it may be formed. To watch the enemy; resist him with obstinacy, should he suddenly attack, until time is gained for the main-body to receive him ; drive in his advanced-posts with impetuosity ; such are the duties which this body may in turn be called on to perform. 147. The first of these duties, that of learning the whereabouts of an enemy, is intrusted to individuals, or to parties of more or less strength, as the occasion iLDVANCED-GUARDS AND ADVANCED-POSTS. 65 # may require ; light cavalry being usually selected, in preference to any other arm, for this service. 148. Head of Advanced Guard. — A head or leading detachment of some force, composed usually of both cavalry andinfantry, andif requisite of some pioneers, forms the advance of the main-body of the advanced- guard, for the purpose of searching all the ground within a dangerous proximity, and of clearing the way for the advancing columns. Through this de- tachment a communication is kept up with the flank- ers, and all the ground is thus hemmed in around the advancing column, by which an enemy might ap- proach it. 140. The strength of the leading detachment will depend greatly upon the character of the country, and upon the state of the weather and season being more or less favorable to the unobserved approach of an enemy. A leading detachment of one-fourth the total strength of the advanced-guard, two flank de- tachments, to act as flankers, of one-eighth, and a rear detachment, acting as a rear-guard, also of one- eighth, taking, in all, one-half the total strength of the advanced-guard, is considered, under ordinary circumstances, a good distribution for the duties to be performed. 150. All the ground, within the proximity of the advanced-guard, must be carefully searched by it. No invariable rule can be laid down on this subject, everything depending on the character of the country, the state of the weather, and the march being by day 66 ADVi^CED-GUARDS AND ADV^CED-POSTS. or night, as to the more or less dispersed order that can be adopted for examining the ground. 151. The leading detachment, and those on the flanks, should keep in a position, with respect to each other, that will admit of prompt mutual support, and guarding against the approach of an enemy unper- ceived. The flank detachments, for this purpose, keeping somewhat to the rear of the leading one. The most advanced portions of these troops should be cavalry, unless the country be mountainous, or very thickly wooded, in which cases infantry is the best arm for the duty. 152. The distance that should be left between the leading detachments and the principal body of the advanced -guard, will depend upon the more or less of necessary precaution already alhided to. An interval of from a thousand to two thousand paces may be left between the leading detachment and the main portion ; the small detachments thrown forward from the leading detachment may precede it from two hundred to six hundred paces; whilst the leading men, who form, as it v/ere, the apex of this disposi- tion, precede the last about one hundred paces. 153. Dispositions of Advanced- Guard. — From these indications of the manner of distributing the troops of the advanced-guard, the following general dispo- sitions, adapted to ordinary circumstances of locality, may be gathered. The apex, or most advanced point, may be formed of a staff, or other intelligent officer, under the escort of a few horsemen ; in his rear follow small detachments of horse, preceded by a line of ADVANCED-GUARDS AND ADVANCED-POSTS. 6T horsemen, as skirmishers, in dispersed order, thrown out from them; this line of small detachments and their men may embrace a front of a thousand or moro paces, according to the face of the country. On each flank of the detachments, from which the skirmishers are thrown forward, march small detachments of both horse and foot, as supports of the line. In the rear of this lino, at a hundred paces or so, may be placed a small detachment, charged with patrolling either on the front or flanks. Finally, at some sixty paces in the rear of the detachment for patrols, follows the remaining portion of the horse and foot compos- ing the leading detachment. The main body of the advanced-guard, following some hundred paces far- ther to the rear ; and the rear of its march being closed by the small rear detachment already men- tioned. It will be seen by comparing this disposition of the troops of an advanced-guard in march, with the one adopted for the advanced-posts at a halt, that they are analagous, and differ in no material respect, as their object in each case is the same. 154. In a forward movement, this general disposi- tion of the troops of the leading detachment should be adhered to, as far as the features of the ground will permit. "Whenever these features become such that a concentration on the centre is rendered neces- sary, a proper order should be temporarily taken, to enable the troops promptly tO' resume their original order, so soon as the ground opens. The leading line of skirmishers will carefully examine all the ground 68 ADVANCED-GUARDS AND ADVANCED-POSTS. over which they pass, and observe all that occurs around them. The men, for this purpose, keeping in pairs, and taking all suitable precaution not to place themselves in positions favorable to being seen from a distance. 155. If the enemy is met, dispositions are immedi- ately taken to receive him. The line of skirmishers is strengthened, the supports brought up, and if there is any artillery, it takes position on the road to sweep it; In this order, the whole of the leading detach- ment falls back slowly upon the main body of the advanced-guard; and further dispositions are made according to the exigency of the case. 166. The general order of march of an advanced- guard remains the same in all circumstances of ground; the position of the troops alone varying with changes of its features. In broken ground, for instance, the line of skirmishers of the leading detach- ment would be of infantry, and this line would be supported by some cavalry. 157. A strict observance of good order, particularly among the troops of the leading detachment, is of the first importance; nothing should therefore be permit- ted which might either withdraw their attention from their chief duty of watching, or which might give warning to an enemy of their approach. They should especially guard against being drawn into the use of their fire-arms, short of an actual surprise. 158. On a night march the precautions should be redoubled. The leading detachment will be more concentrated, keeping mostly to the road. If the ADVANCED-GtTARDS AND ADVANCED-POSTS. 69 enemy is seen, word will be sent at once to the rear, for a halt, and the suitable dispositions will be taken, as noiselessly as practicable. 159. All defiles met with of any length should be examined carefully by some scouts, before any num- ber of troops venture into them, and then proper measures should be taken for securing them from an attack, until the troops are all clear of them. All woods that can be easily gone round should be made the circuit of by some horse, before passing through them. The thick forests should be carefully exam- ined, a hundred or more paces on each side of the road. And in all case^ any doubtful ground must be first searched, by the leading troops, before any large bodj^ approaches within musket-range of it. IGO. Flank Patrols. — Besides the flankers proper, which constitute a part of the movable advanced- posts, detachments of an independent character are sent out to patrol along the flanks of the main col- umn. These should keep themselves in communica- tion, by suitable dispositions of vedettes, with the flankers. 161. As the flank patrols are frequently beyond direct supporting distance, they must adopt all the necessary dispositions against surprise of any other body marching independently, having their advanced- guards, &c., &c. 162. These patrols keep on a level with their col- umn, and particularly secure all lateral roads or defiles, by which it might be suddenly attacked, until the column is beyond danger. Great activity, 70 ADVANCED-GUARDS AND ADVANCED-POSTS. watclifulness, and caution, should characterize this service. The officer in command of a flank patrol must use his discretion, in meeting an enemy, whether to attack him, or let him pass, if he has not himself been observed. 163. Rear-Guard. — The duties of a rear-guard, in retreat, will depend upon the more or less of activity and vigor shown by the enemy in pursuit. If the enemy is enterprising, then it will require all the sagacity of the commanding-officer; all the firmness of the soldiers, to cover and defend the rear of the column, and to guard against demonstrations upon its flanks. To hold the enemy in check, just the time necessary to enable the retreating column to extricate itself from unfavorable ground, and then to withdraw from the fight, without being too far compromised; to prevent the enemy from pressing on so hotly as to force the main body of the rear-guard upon the tail of the column whose retreat is to be secured, are problems of no easy solution, and cilll for all the best military qualities, both in the officer and the troops to whom the solution is assigned. 164. In mutual support among all the arms, apti- tude for turning to advantage all variations in the features of the ground, and tenacity in keeping every advantage offered until the last safe moment, reside the excellence of a rear-guard. In interdicting by the tire of its skirmishers all approach to its covers ; in occasional bold manreuvres of its light artillery, when the enemy's columns are open to its fire ; in daring rapid charges of its cavalry, when the enemy ADVANCED-GUARDS AND ADVANCED-POSTS. 71 presses forward to gain some critical point, a rear- guard may give an enemy such lessons as will force him to adopt that prudential course on which its own safety, and that of its column, alone de- pend. 165. As the march of a rear-guard is an almost continual running fight, its dispositions should be taken for this phase of its duties. Its rear should accordingly be closed by a line of skirmishers, pro- perly supported by the other arms. This line must equally exhibit caution, coolness and firmness> giving way to no hasty movements, and reserving its fire until it can be thrown in with murderous efl^ect. If forced back by superior numbers, the kirmishers should concentrate on the flanks of the other troops, leaving the road clear, either for the fire of the artillery, or for the action of cavalry, or of infantry in mass. 166. In all its actions, the rear-guard should never lose sight of the danger it continually runs of being surrounded, or cut off, by a movement on its flanks or rear. Against this, its only course is to push out flank patrols, as far as they can safely venture, restricting these to the duties of conveying timely warning to the main-body of the rear-guard of any appearance of a movement of the kind referred to. and of preventing it, if attempted, by a bold stand, either defensive or offensive, as circumstances may demand. 167. Advanced- Posts in Cantonmeyits. — As canton- ments are taken up either during seasons when op- 72 ADVANCED -QTJARDS AND ADVANCED-POSTS. erations cannot be well carried on, or to give the troops some extraordinary repose, after a harassing cam- paign, more advanced-posts will generally be ne- cessary than under ordinary circumstances, and to fulfil their end they ought to be placed on ground favorable to a strong resistance, in order to give the separated corps time to concentrate against an earnest attack of the enemy. 168, A good disposition of stations for out-posts, from which the enemy can be seen at a distance; a line of supports placed on strong ground in the rear ; easy communications for concentration on the main-body ; active and vigilant patrols, kept moving not only along the front, but penetrating on the flanks and rear of the enemy, to get wind of his strategical plans : such are the general precautions demanded of its advanced-posts, by an army in sta- tion for some time. 169. In the disposition of the main force to concur with the preceding, one precaution should not be omitted in a stay of any duration ; and that is, not to allow any one body to remain long enough in a village, or inhabited place, to become in a degree domesticated. Nothing is more likely than this to injure the morale of the best troops. The seductions of otherwise harmless pleasures, may lead to fatal habits of remissness in duty ; and the officer quietly indulging in his game at cards, in a family circle, may receive his summons for surrender as he is gath- ering up his last trick. CHAPTER IV. KECONNOIS8ANCK8, 170. There are no more important duties which an officer may be called upon to perform than those of collecting and arranging the information upon "Which either the general or daily operations of a campaign must be based. For the proper perform- ance of the former, acquirements of a very high order, in the departments of geography and statistics, are indispensable requisites, to which must be added a minute acquaintance with topography, and a good coup (Vceil militaire for that of the latter. 171. However detailed and perfect may be a map, it can never convey all the information that will en- able an officer to plan even an ordinary march with safety, still less operations that necessarily depend for their success upon a far greater number of con- tingencies. To supply these deficiencies of maps, an examination of the ground must be made by the eye, and verbal information be gained, on all the points connected with the operation over this ground. This examination and collection of facts is termed a Recoymoissance. 172. From the services demanded of a reconnoi- 74 RECONNOISSANCES. tring officer, it is, in the first place, evident that he should possess acquirements of no ordinary character, but in addition to these, he should be gifted by na- ture with certain traits, without which his acquisi- tions would be of little account in the discharge of the responsible duty in question. 173. With clear and specific information before him, one-half of a general's difficulties in planning his measures, are dissipated. In a letter from Gen. Washington to Maj. Tallmadge, now to be seen framed in the office of the Commissary-General of New York, he remarks, in relation to reports made to him on a certain occasion: "But these things not being delivered with certainty, rather perplex than form the judgment." It is in truth this feeling of certainty that constitutes all the diiference ; hav- ing it, the general makes his dispositions with confi- dence ; without it, he acts hesitatingly, and thus communicates to others that want of confidence felt in his own mind. 174. An officer then, selected for the duty in ques- tion, should be known to be cool-headed and truthful — one who sees things as they are, and -tells clearly and precisely what he has seen. In making his re- port, whether verbally or in writing, the officer should study conciseness and precision of language. He must carefully separate what he knows from his own observation, from that which he has learned from others, and add all the circumstances of place, and time, with accuracy. 175. Duties of Reconnoitring Officer. — The first RECONNOISSANCES. 75 thing to be done by an officer selected for a recon- noissance, isto ascertain precisely the duty required of him ; arid what further should be done in case of certain contingencies that may, from the nature of the duty, be naturally looked for. In the perform- ance of the duty assigned him, and in making his report, the officer should keep always in mind the specific character of his mission, as his guide in both points. 176. As the need of a reconnoissance supposes a deficiency in information upon the features of the country, the officer detailed to make one should pro- vide himself with maps, a good telescope, such simple aids for judging of distances, and ascertain- ing the relative positions of objects, as he can him- self readily make ; writing materials ; one or more good guides ; and gain all the knowledge he can, from the inhabitants at hand, bearing upon his mission. 177. The talent of judging of distances, and of the connection between the various features of a country within the field of vision, is partly a natural and partly an acquired one. Some individuals can never be brought to have any confidence in their own judgment on these points; others have a natural aptitude for them, which requires but little practice for their perfect development. The powers of the eye vary so greatly among civilized persons, that no general rules can be laid down as a guide for the matter in question. Among uncivilized hordes, used to a roaming life, there are found standards 76 RECONNOISSANCKS. "which are well understood by all ; the Arab, for in- stance, calling that distance a mile, at which a man is no longer distinguishable from a woman — grow- ing out of their habits. 178. The first thing, then, to be done by an officer in acquiring the coup d'ceil Tnilitaire, is to learn, both from books and on the field, what space is taken up by a battalion and its intervals, by a squadron, and by a battery when in order of battle; how much when in column of march ; and the average time required for certain movements, under given circum- stances of the ground. This acquirement he may make by adopting some standard of his own, his ordinary pace, and that of a horse, serving for com- puting time and distance reciprocally. The next step is to acquire the habit of estimating, by the appearances of these difierent objects, from various points of view, how far off they are. This must be done practically. A very simple aid to it is the fol- lowing : Upon the stem of a lead pencil, cut square, and held out at a uniform arm's length from the eye, by means of a thread attached to it and fastened to the top button-hole, let the officer mark off, on one of the edges, the length seen on it by holding the pencil upright between the eye and a man placed successively at different distances from it, as 100, 150 — 1000 yards. This will give one rough standard for practice. Another may be made by first ascertain- ing the average height of certain cultivated trees, as the apple, &c. 179. For getting relative positions, a contrivance RKCONNOIS8ANCE8. 77 for measuring angles roughly must be used. This is done by first folding a leaf of paper across, and then doubling it along the folded edge, as if to divide it into four equal parts. The angle between the edge of the first fo^d and that of the second, will be a tol- erably accurate right-angle. Now, by cutting off carefully along the fofd one of the pieces, we obtain a quadrant, or 90°; then folding this at the angle, so that the two edges will exactly coincide, we get the half of a quadrant, or 45°; and so on, by successive bisections we can mark off smaller angles. Then making a pen or pencil-mark along each of the folds, and numbering the angles successively from to 90°, we have a rough protractor, that can be used both for measuring angles and setting them off on a sketch. To measure vertical angles, a thread with a light plummet, must be attached to the angular point. If the object is above the horizon of the eye, we hold the protractor with the angular point from the eye, so that the plumb-line will fall along the face of the paper, just touching it ; then directing the top edge of the protractor on the object, so that it is just seen by the eye, sighting along the edge, the angle formed between the plumb-line and the other edge, will be the same as the angle between the line of sight and the horizon of the eye. If the object is below the horizon of the eye, the angular point is placed towards the eye; the same series of operations will give the angle below the eye's horizon. 180. Guides. — Trustworthy guides are invaluable. 78 RECONNOISSANCES. but most rare, in an enemy's country. The best, from the information they acquire by their habits of life, are to be found among those classes whose avo- cations keep them much abroad, going from place to place within a certain sphere constantly — such as common carriers, hunters, smugglers, &c. Among the first things to be attended to by an ofiicer, in taking post at any point, is to find out persons of this class, and to ascertain their whereabout when wanted. Kind treatment, douceurs, and promises, should not be spared, to enlist either their good will or their interests; and, if policy requires it, they may openly be treated with apparent harshness, to screen them from odium among their neighbors. 181. If none of this class can be found, then resort must b.e had to a higher — local authorities being in preference selected — and if necessary, forced to act. Here very careful treatment is requisite. When the necessity of the case is admitted by them, much may be gleaned by kindness, courtesy, and a certain defer- ence, from such persons, that cannot be looked for from their inferiors. 182. Before starting on his mission, the officer should question his guide thoroughly; and if he has several, question each apart; like precautions should be taken with respect to other inhabitants. Care must be had to find out the usual beats of one taken as a guide, so as not to take him out of his own neighborhood. In all cases, the guide must be well watched, however trustworthy he may seem. If un- \villing or sulky, he must, if needs be, be tied, and KECONNOISSANCES. 79 attiiched to a strong man, with a rope round his mid- dle; being first strictly searched for any cutting in- strument about him. 183. Should there be but one guide, he must ne- cessarily be placed with the most advanced portion of the detachment accompanying the officer. If there are several, one must be there also; the one apparently the most intelligent with the officer, who should ply him with questions, and the others in the rear strictly guarded. 184. It may be well to remark, that guides are useful even in a country of easy communications ; as in case of a rencontre, they may point out bye- ways convenient for cetreat, if necessary. 185. Reconnoissance. — To designate all the objects to be embraced in a reconnoissance, would lead far- ther than the limits of this little work will allow ; some general heads, which will serve as guides in all cases, will therefore be alone noticed. 186. A general view of the ground to be examined must first be taken in, so as to obtain some notion of the forms of the parts, their connection and relations to each other, before going into a detailed examina- tion. To one possessed of some topographical knowl- edge, this study of what is before him will not de- mand much time. A level country, for example, he knows is usually well cultivated, and therefore has plenty of hedges, ditches, &c., which lend themselves well to affairs of light troops ; may be not a little inconvenient to manoeuvres of artillery, and fre- quently bring up cavalry very unexpectedly in full 80 RBCONKOISSANCES, career. In a mountainous one, dangerous passes, narrow roads, torrents with rough beds, ugly sudJen turns, &c., will necessarily be met with. Each and all of these demand a particular examination, and in his report their advantages and disadvantages should be clearly pointed out by the officer. 187. If the reconnoissance is for an onward move- ment, the distances from halt to halt, as well as all others, should be estimated in hours of march; the nature of the roads, and the obstacles along them be carefully detailed ; the means that may be gathered along the line to facilitate the movement, as vehicles, men and materials for removing obstacles &c. The points where cross-roads are found, must be specified; the direction of these roads, their uses, &c. 188. All local objects along the line, as villages, farm-houses, &c., should be carefully designated, both as to their position on the line, or on either side of it ; and also as to their form, and color, &c., as ** square white house on the right," ♦♦ round gray stone tower on hill to left." 189. The names of localities, in the way in which the inhabitants pronounce them, should be carefully written, and called over several times, so as to be sure to get them as nearly as practicable right in sound ; then the names, as written by an intelligent inhabitant, should be added. 190. All halting points must be well looked to ; their military capabilities in case of attack, as well as their resources for accommodating the troops, be thoroughly gone into. RKCONNOI8SANCE8. 81 If the halt ia to take position for some time, to await or watch the enemy, then more care must bo taken, the whole site be well studied as to its fulfilling the proposed end; the points of support on the flanka bo designated, as well as others in front and rear, that may require to be occupied ; the suitable lo- calities to be chosen for parks, hospital, «&c.; the communications to be opened or repaired, pointed out ; and all the facilities either for an advance or a retrograde movement, be laid down. 191. Armed Reconnoissanee. — Recon n oissances, made in the neighborhood of an enemy, require to be done under the protection of a proper detachment, the strength and composition of which will depend on the object to bo attained. 192. If the object be to gain secretly a knowledge of the enemy's whereabout and strength, then a de- tachment of light cavalry, conducted by a trusty guide, through circuitous bye-ways, and moving with celerity, but with proper precautions against falling into an ambush, or having his retreat cut off, is usu- ally resorted to. The details for this will be found under the head of Patrols. 193. When an enemy's position is to be recon- noitred, with a view to force him to show his hand, by causing him to call out all his troops, then a large detachment of all arms, adequate to the task of pressing the enemy vigorously, and also of withdraw- ing with safety when pressed in turn, must be thrown forward. 194. Under the shelter of either of these forces. 82 RBCONNOISSANCES. the officer charged with the reconnoissance, takes the best moment, and best point of view, for carefully- ascertaining the dispositions made by the enemy. A good time will be at early dawn, when troops, in most services, are all made to stand to their arms. The points which the officer must exhibit most atten- tion in ftnding out, are those occupied by the bat- teries, and all those in any way intrenched. , 195. Patrols. — Patrols are of two classes, from the different objects had in view. The first are those made with a view of insuring greater security from the enemy's attempts to pass, or. force the line of out- posts, and may therefore be termed defensive patrols. They consist usually of three or four men, who go the rounds, along the chain of sentinels and between the posts; seldom venturing farther 1 ban a few hun- dred paces beyond the sentinel's cbain; the object being to search points which might present a cover to the enemy's scouts, and to keep the sentinels on the alert. 196. The second class are those made exterior to the line of out-posts, with a view of gaining intelligence of the enemy's whereabout, and may therefore be termed offensive patrols. They are composed of larger bodies of men than the first class, the number being proportioned both to the distance to be gone over, and the extent of front to be examined. In a posi- tion, presenting but few cros^-roads, and sparsely settled, a patrol of ten or twenty horsemen, may be found ample, to search with all desirable thorough- ness, from twenty to forty miles in advance of the position, along the principal avenues to it; whereas, RECONNOISSANCES. 83 with a moro extended front, presenting many lateral avenues, double this number might be required for the same duty. From the information obtained, through the ordinary channels of maps, and by ques- tioning the inhabitants at hand, the commanding officer can usually settle, with sufficient accuracy, the strength of a patrol. 197. From the duties to be performed by patrols, cavalry are usually emploj^ed alone; in cases of very broken country, infantry may be necessary, but they should always be accompanied by some horse, if for no other purpose than to transmit intelligence promptly to the rear. 198. The main duties of a patrol are to find the enemy if in the neighborhood, gain a good idea of his position and strength, to make out his movements, and to bring in an accurate account of his distance from the out-posts of their own force, and the char- acter of the ground between the position occupied by the respective forces. 199. From the nature of these duties, it is evident that both officers and men, for a patrol, should be selected with especial reference to their activity, intel- ligence, and the aptitude they may possess, from pre- vious habits of life, for a service requiring a union of courage, prudence, and discriminating observation —usually to be met with only in individuals who have been thrown very much upon their own resour- ces. When the character of the country admits of it, the employment of such individuals, singly, or in very small bodies, as scouts, is one of the most avail- 84 RECONNOI88ANCKS. able means of gaining intelligence of an enemy, without betraying the secret of our own whereabout. 200. Duties of Officer in command of a Patrol. — In conducting a patrol, the commanding officer should provide himself with a good map, telescope, and guides, and gain all the information he can before starting, by questioning persons in the neighborhood. JS'othing should escape his eye along his line of search, and he should particularly note points which might -%e favorable to his defence, if driven back by the enemy, Oi by which his retreat might be endan- gered. 201. The order of march of the patrol will be reg- ulated by the circumstances of its strength, kind of troops employed, the character of the country passed over, the hour of the day, and the particular object in view. The intelligence and judgment of the officer in command will have sufficient exercise on these points, as he will be continually called upon to vary his dispositions. The general and obvious rule of keeping a look-out on all sides, will prompt the general disposition of an advanced-guard, rear-guard, and flankers, according to the circumstances of the case, however small his command. The sole object being to carry back intelligence of the enemy, no precaution should be omitted to cover and secure his line of march, without making, however, too great a subdivision of his force. 202. Too much circumspection cannot be shown in approaching points favorable to ambuscades, as woods, ravines, defiles, inclosures, farm-houses, villa- RECONNOISSANCIS. 8S ges, &c. The main body should always be halted, in a good position beyond musket-shot, or where cover can be obtained, whilst a few men proceed cautiously forward, following at some distance in the rear of, but never losing sight of each other, to examine the sus- pected spot. If the officer deem it necessary, at any point, to detach from his command smaller patrols, to examine points at some distance on his flanks, he should halt the rest at the point where they separate, until the detachments come in and report; or if he decides to move forward, he should leave three or four men at the spot, to convey intelligence promptly to the rear, if anything is discovered, as well as to himself. 203. It may frequently be found that some eminence on the flanks may present a good view of the sur- rounding country, in which case, if it be decided t» use it, two or three men ought to be detached for the purpose, with orders to keG|> in sight of cash other, but far enough apart to guard against a surprise of the whole. 204. When the officer finds himself in the presence of the enemy, he should halt his command at a con- venient spot, where where they will be screened from the enemy's view, and having made his dispositions against a surprise, he will proceed with a few picked men to the most favorable point from which he can obtain a good look-out, to reconnoitre the position occupied, and the other points of interest. If he deem it advisable to keep his position, or change it for some other point more favorable, he will first transmit a report to the rear of what he has observed. 86 RECONNOISSANCES. 205. "When the patrol moves "by night, the ordinary- precautions must be redoubled. Signals must be agreed upon to avoid danger, should any of the party become separated from the main body. Careful atten- tion must be given to every thing passing around, as the barking of dogs, noises, iBres, &c. On approach- ing any inhabited spot, the command should be brought to a halt, whilst a few picked men move noiselessly forward, and if practicable, by stealing up to the windows, learn the character of the inmates. 206. It cannot be too strongly impressed upon the mind of the officer in command of a patrol, that he must be all ears and eyes ; that he will be called upon in turn, to exercise great boldness, caution, presence of mind and good judgment, in accomplishing a mis- sion where the enemy must be seen but not encoun- tered ; and such roads and halting points be selected, both in moving forward and returning, as shall be most favorable to his movements, and least liable to expose him to surprise, or a disadvantageous collision with the enemy. CHAPTER V. DETACHMENTS. 207. Detachments consist of small bodies of troops, composed of one, or several arms, to which are intrusted some mission connected with the operations of the main body, but, for the most part, performed beyond the sphere of its support; such, for example, as the occupation of some post, or defile, which is to be held temporarily, as necessary to the movements of the main body; the surprise of a post held by the enemy ; the seizure of a convoy, &c. 208. The composition of a detachment will depend upon the nature of the duty to be performed, the character of the country in which it is to operate, the distance of the point to be reached, and the more or less celerity required in the operation. As a gen- eral rule,