Centurion - professional officer of the Roman army

"A centurion was a professional officer of the Roman army after the Marian reforms of 107 BC. Centurions commanded a century of around 80 legionaries. The centuries commanded by the centurion theoretically derive from centum ("hundred"), but that connection is now disputed. It certainly meant "company" or "tribe", but senior centurions commanded cohorts or took senior staff roles in their legion. Centurions were also found in the Roman navy. In the Byzantine Army, they were also known by the name kentarch. Their symbol of office was the vine staff, with which they disciplined even Roman citizens protected from other forms of beating by the Porcian Laws. - Wikipedia"