Roman legion
Heavy infantry: This was the principal unit of the legion. The heavy infantry was composed of citizen legionaries that could afford the equipment composed of an iron helmet, shield, armour and pilum, a heavy javelin whose range was about 30 meters. After 387 B.C. the preferred weapon was the gladius, a short sword. Their hobnailed sandals were also an effective weapon against a fallen enemy. The heavy infantry was subdivided, according to experience, into three separate lines of troops: