id author title date pages extension mime words sentences flesch summary cache txt en-wikipedia-org-4649 Magister militum - Wikipedia .html text/html 3180 752 57 Magister militum (Latin for "Master of Soldiers", plural magistri militum) was a top-level military command used in the later Roman Empire, dating from the reign of Constantine the Great.[dubious – discuss] The term referred to the senior military officer (equivalent to a war theatre commander, the emperor remaining the supreme commander) of the Empire. The title of magister militum was created in the 4th century, when the emperor Constantine the Great deprived the praetorian prefects of their military functions. During the reign of Emperor Justinian I, with increasing military threats and the expansion of the Eastern Empire, three new posts were created: the magister militum per Armeniam in the Armenian and Caucasian provinces, formerly part of the jurisdiction of the magister militum per Orientem, the magister militum per Africam in the reconquered African provinces (534), with a subordinate magister peditum, and the magister militum Spaniae (c. ./cache/en-wikipedia-org-4649.html ./txt/en-wikipedia-org-4649.txt