What is the role of a captain of one hundred infantry in the ancient Roman army?

The captain of one hundred infantry in the ancient Roman army is identified as a Centurion. Centurions were non-commissioned officers known for their leadership and tactical expertise, responsible for the training, discipline, and command of a century, which consisted of approximately 80 to 100 soldiers. Their primary role was to ensure that their men were well-organized and motivated during battles, as well as to maintain order during peacetime. They played a pivotal role in the hierarchy of the Roman military, often serving as the backbone of the legion’s structure due to their experience and direct involvement in combat.

In contrast, a legionnaire refers to a standard soldier in the Roman army, while a tribune is typically a high-ranking officer who could command a cohort or serve in various administrative capacities within the army, and a consul is a high-ranking political leader in the Roman Republic, with no direct correlation to the command of infantry at the unit level. Thus, while all roles are essential to the functioning of the Roman military and government, the definition of a captain of a hundred infantry specifically aligns with the duties and responsibilities of a Centurion.