A Roman Centurion was in charge of 100 soldiers in the ancient Roman army. The word "centurion" comes from the Latin word "centuriae," which means "group of 100." The centurions were responsible for maintaining order and discipline within their units, as well as for training and leading their soldiers in battle. They were also responsible for ensuring that their soldiers were properly equipped and supplied, and for reporting to their superiors on the status of their unit. The position of centurion was highly respected and coveted, as it offered opportunities for promotion and advancement within the Roman military hierarchy.