Praefectus castrorum

Roman army position responsible for logistics and training

The praefectus castrorum was, in the Roman army of the early Empire, the third most senior staff officer of the Roman legion after the legate (legatus) and the senior military tribune, both of whom were from the senatorial class. The praefectus castrorum was a quartermaster responsible for military logistics and requisition but could command the legion whenever the senior commanders were absent. The post was usually held by a soldier promoted from the centurionate, having already served as a chief centurion of a legion, and was therefore open to ordinary, plebeian citizens. Prefects of this rank, for example Sextus Vibius Gallus, were awarded prizes (dona) to mark their achievements.

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