De re militari

["Military art and science" "Early works to 1800" "Army" "Bodleian Library" "Cavalry" "Rome" "Rome army" "Poetry" "Rome history empire 30 b.c.-476 a.d." "Military art and science history" "Navy" "Art et science militaires" "Arm\u00e9e" "Armed Forces" "Krijgskunde" "Epitoma rei militaris"]