id author title date pages extension mime words sentences flesch summary cache txt en-wikipedia-org-8945 Roman army - Wikipedia .html text/html 7454 631 63 The Roman army of the late Republic (88–30 BC) marks the continued transition between the conscription-based citizen levy of the mid-Republic and the mainly volunteer, professional standing forces of the imperial era. During this period, the Republican system of citizen conscription was replaced by a standing professional army of mainly volunteers serving standard 20-year terms (plus five years as reservists), although many in the service of the Roman Empire would serve as many as 30 to 40 years on active duty, as established by the first Roman emperor, Augustus (sole ruler 30 BC–14 AD). In this phase, crystallised by the reforms of the emperor Diocletian (ruled 284–305 AD), the Roman army returned to regular annual conscription of citizens, while admitting large numbers of non-citizen barbarian volunteers. ./cache/en-wikipedia-org-8945.html ./txt/en-wikipedia-org-8945.txt