General San Martín formed the army with 3 generals, 28 chiefs, 207 officers, 15 civilian employees, 3,778 enlisted men (made up of a majority of black and mulatto soldiers, more than half freed slaves. A specific group of blacks in Chilean history are the members of the 8th Regiment of the Army of the Andes that fought the Spaniards in Chacabuco. That was the army organized by the United Provinces of the Río de la Plata and led by José de San Martín to liberate Chile and later allow the liberation of Peru. San Martín demanded black slaves as contribution to the Army of the Andes by the Mendoza landowners, because in his opinion blacks were the only people capable of participating in the infantry component of the army, and included them in the forces commanded later by Bernardo O'Higgins. They were included in the Army of the Andes and received their freedom after the crossing of the Andes and the fight against the Spaniards. As members of the infantry they were exposed to higher risks during battle. This episode of the history of Chile is very seldom mentioned and the group of blacks has never received any recognition for their contribution to the liberation of Chile.