The legion of Cæsar’s day was a division of six thousand infantry at full strength, exclusive of officers. It was divided into ten battalions (_cohortes_), and each cohort into six companies (_centuriæ_), each of one hundred men, under a centurion (_centurio_) generally, so far as is known, promoted from the ranks. Into the complicated question of the ranking and promotion of these officers, there is no need to enter here; it is sufficient to say that the senior centurions were entitled to sit in councils of war, and that the senior of all (_primi pili centurio_ or _primipilus_) often appears as playing a very distinguished part. Attached to each legion were six officers called tribunes, frequently young gentlemen learning the art of war. Often, as might be expected, they were rather a nuisance than otherwise; but there were exceptions, notably C. Volusenus, who has just been mentioned. Probably the trouble was to induce them to take their military position seriously. Cæsar’s higher executive officers were his ten lieutenant-generals (_legati_), of whom we frequently meet several in command of one, two, or more legions. The best was Titus Labienus, strangely enough the only one who sided against his general in the Civil War. He was a greedy, cruel, and unprincipled man, but beyond doubt a great general; Cæsar repeatedly gives him unstinted praise. Of the others, probably the most promising was the young P. Licinius Crassus, who was to perish on his father’s ill-starred expedition against the Parthians; but several were men of real distinction. Among them may be mentioned M. Antonius, afterwards the rival of Augustus; Decimus Junius Brutus, the hero of the naval victory over the Veneti; C. Fabius Maximus; Q. Tullius Cicero, brother of the more famous Marcus, but himself a soldier of great merit; and C. Trebonius. Cæsar’s chief administrative officer was his _quæstor_ (quartermaster-general), M. Licinius Crassus.