What was a Roman centurion?

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 ... They formed the backbone of the legion and were responsible for enforcing discipline.

A Roman Centurion was a man placed in charge to carry out all the bad people deaths choices