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
Campaign of Sucre in Upper Peru to invade Upper Peru to Potosí. Royalist general Pedro Antonio Olañeta, hearing of the defection half of his forces under Col Medinaceli, and passed to the patriots, Olañeta attack them on April 1, 1825. Olaneta wound in combat fell to the ground. His soldiers surrender. Olaneta died the following day, April 2. That same day Col.Medinaceli referred the part of the battle to Marshal Sucre, who ended the military campaign. Campaign of Sucre in Upper Peru Campaign of Sucre in Upper Peru was a set of military operations conducted by the Liberator United Army of Peru to dislodge the Spanish