The Roman legion--whether it was composed of four thousand men, as in the early ages of the republic, or six thousand, as in the time of Augustus--was divided into ten cohorts, and each cohort was composed of Hastati (raw troops), Principes (trained troops), Triarii (veterans), and Velites (light troops, or skirmishers). The soldiers of the first line, called Hastati, consisted of youths in the bloom of manhood, who were distributed into fifteen companies, or maniples. Each company contained sixty privates, two centurions, and a standard-bearer. Two thirds were heavily armed, and bore the long shield; the remainder carried only a spear and light javelins. The second line, the Principes, was composed of men in the full vigor of life, divided also into fifteen companies, all heavily armed, and distinguished by the splendor of their equipments. The third body, the Triarii, was composed of tried veterans, in fifteen companies, the least trustworthy of which were placed in the rear; these formed three lines. The Velites were light-armed troops, employed on out-post duty, and mingled with the horsemen. The Hastati were so called because they were armed with the _hasta_, or spear; the Principes for being placed so near to the front; the Triarii, from having been arrayed behind the first two lines as a body of reserve. The Triarii were armed with the pilum, thicker and stronger than the Grecian lance, four and a half feet long, of wood, with a barbed head of iron,--so that the whole length of the weapon was six feet nine inches. It was used either to throw or thrust with, and when it pierced the enemy's shield the iron head was bent, and the spear, owing to the twist in the iron, still held to the shield. Each soldier carried two of these weapons, and threw the heavy pilum over the heads of their comrades in front, in order to break the enemy's line. In the time of the empire, when the legion was modified, the infantry wore cuirasses and helmets, and carried a sword and dagger. The select infantry were armed with a long spear and a shield; the rest, with a pilum. Each man carried a saw, a basket, a mattock, a hatchet, a leather strap, a hook, a chain, and provisions for three days. The Equites (cavalry) wore helmets and cuirasses, like the infantry, having a broadsword at the right side, and in the hand a long pole. A buckler swung at the horse's flank. They were also furnished with a quiver containing three or four javelins.