Officers and Ranks in the Roman Army The Ordinary Legionary Soldier Miles The Duty Officer Tesserarius The Centurions Assistant Optio The Centurion Centurio Primus Pilus The Standard Bearer Signifer The Horn Player Cornicen The Flag Bearer Vexillarius The Junior Tribunes Tribuni angusticlavii The Senior Tribune Tribunus laticlavius The Eagle Bearer Aquilifer The Commander of the Camp Praefectus castrorum The General of the Legion Legatus The Governor of the Province Legatus Augusti Propraetor