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The primus pilus was the senior centurin in the Roman Legion. The word translates to "first spear".

Role in historyEdit

In the late Roman republic, the cohort (of which there were between six and ten) became the basic tactical unit of the legions. The cohort was composed of five to eight centuries, each led by a centurion assisted by an optio, a soldier who could read and write. The senior centurion of the legion and commander of the first cohort was called the primus pilus, a career soldier and advisor to the legate. While every normal cohort was composed of five to eight centuries (normally six in secondus to decius cohorts), the one that was led by the primus pilus (the first) had about ten centuries, or 800 men. It also had a number of other staff, such as cooks, clerks, etc.; that is, non-combatants. In modern infantry ranks, primus pilus would be considered a Major in relation to battalion-size units, though there is no direct corresponding equivalent.

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