Imperial Roman army

Roman Empire from about 27 BC to 476 AD This article should specify the language of its non-English content using {{lang}} or {{langx}}, {{transliteration}} for transliterated languages, and {{IPA}} for phonetic transcriptions, with an appropriate ISO 639 code. Wikipedia's multilingual support templates may also be used - notably la for Latin. See why. (February 2024) Roman armyExercitus RomanusVexillum with the imperial aquilaActive27 BC to 476 ADCountryRoman EmpireTypeArmyRoleLand warfareSize450,000 (211 AD)Part ofRoman militaryNicknamesList of namesEquipmentList of equipmentDecorationsList of decorationsCommandersCommander-in-chiefEmperor (de facto)Consuls (de jure)Military unit Part of a series on theMilitary of ancient Rome 753 BC – AD 476 Structural history Army Unit types and ranks Decorations and punishments Legions Auxilia Generals Navy Fleets Admirals Campaign history Regal Period Mid-Republic Wars and battles Technological history Military engineering Castra Siege engines Triumphal arches Roads Political history Strategy and tactics Infantry tactics Frontiers and fortifications Limes Walls Limes Britannicus Antonine Wall Hadrian's Wall Saxon Shore Limes Germanicus Alb