Background (life) This picture is taking place at a field as the military leader José de San Martin led his regiment to the win. The battle had its own name which was the battle of San Lorenzo which was fought on February 3, 1813, in San Lorenzo, Argentina, then part of the United Provinces of the Río de La Plata. This battle was a baptism of fire for this military unit, and for San Martín in the Spanish American War of independence. A Spanish Royal force under the command of Antonio Zabala was defeated by the Regiment of Mounted Grenadiers, of the command of José de San Martín. This picture is taken place at the city of lima. In the month of July, 1821, San Martin enters triumphant to the city of Lima, proclaims independence, is designated Protective of Peru and exerts the government.