Gran Colombia–Peru War was the kernel of Bolívar's grander scheme to unite the former Spanish colonies in Central and South America. Prior to becoming the titular head of Gran Colombia, Bolívar had been, briefly, the president of the newly independent state of Bolivia, his namesake. Bolivia had formerly been a part of the Viceroyalty of the "Rio de La Plata", known as Upper Peru, and, once Bolívar relinquished the presidency of Bolivia to his revolutionary compatriot, Antonio José de Sucre Alcalá, in 1826, the Peruvians saw an opportunity. Early in 1828, Peru launched a campaign against Bolivia to reclaim its former territory and
Protectorate of Peru of the 1780-1781 uprising by indigenous leader Túpac Amaru II and the earlier removal of Upper Peru and the Río de la Plata regions from the Viceroyalty of Peru. Because of this the viceroy often had the support of the "Lima oligarchy," who saw their elite interests threatened by popular rebellion and were opposed to the new commercial class in Buenos Aires. During the first decade 1800s Peru had been a stronghold for royalists, who fought those in favor of independence in Perú, Upper Peru, Quito and Chile. Among the most important events during the war was the proclamation of