A centurion, also hekatontarch (ἑκατόνταρχος) in Greek sources, or, in Byzantine times, kentarch (κένταρχος) was a professional officer of the Roman army after the Marian reforms of 107 BC. Most centurions commanded 83 men despite the commonly assumed 100, but senior centurions commanded cohorts, or took senior staff roles in their legion. Centuries, or Centuriae, means tribe or company.
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centurion In the ancient Roman army, an officer who had the command of a hundred men.