Romulus divided the populace into three tribes, known as the "Ramnes", "Titienses", and "Luceres", for taxation and military purposes. Each tribe was presided over by an official known as a tribune, and was further divided into ten curia, or wards, each presided over by an official known as a "curio". Romulus also allotted a portion of land to each ward, for the benefit of the people. Nothing is known of the manner in which the tribes and curiae were taxed, but for the military levy, each curia was responsible for providing one hundred foot soldiers, a unit known as a "century", and ten cavalry. Each Romulean tribe thus provided about one thousand infantry, and one century of cavalry; the three hundred cavalry became known as the Celeres, "the swift", and formed the royal bodyguard.