The Roman Army Division was composed of legions, which were military units of around 5, 000 soldiers. Each LEGION was divided into cohorts, which were further divided into centuries of 80 men. The term 'LEGION' is derived from the Latin word legio, meaning 'LEVY' or 'CONSCRIPTION'. The Roman Army was one of the most successful and powerful military forces in history, and its legions played a major role in the expansion of the Roman Empire.