Size of the Roman army
Republican period (509 - 31 BC)
We know from Livy that at the time of the Latin War (340-338 BC) there were normally two armies enlisted, composed of two legions of 4,200-5,000 infantry and 300 cavalry each, for a total armed force of 16,800-20,000 infantry and 1,200 cavalry. with an equal number of allied infantry and three times as many cavalry - i.e. 16,800-20,000 infantry and 3,600 cavalry (called socii).
Size of the Roman army-3