centurion

centurion, the principal professional officer in the armies of ancient Rome and its empire. The centurion was the commander of a centuria, which was the smallest unit of a Roman legion. A legion was nominally composed of 6,000 soldiers, and each legion was divided up into 10 cohorts, with each cohort containing 6 centuria. The centurion thus nominally commanded about 100 men, and there were 60 centurions in a legion. The centurions in a legion...