Viceroyalty of Peru arrived in Lima with Antonio José de Sucre to plan the offensive. In February 1824 the royalists briefly regained control of Lima. Olañeta's Rebellion started by surprise and the entire royalist army of Upper Peru (today's Bolivia) revolted, led by Pedro Antonio Olañeta (royalist) against La Serna, the viceroy of Peru (a liberal). This broke the royal army and started a civil war in Upper Peru. Having regrouped in Trujillo, Bolívar in June led his rebel forces south to confront the Spanish under Field Marshal José de Canterac. The two armies met on the plains of Junín on August 6,
Protectorate of Peru this, Peru remained strongly royalist and participated in the political reforms implemented by the Cádiz Cortes (1810–1814), despite Abascal's resistance. Peru was represented at the first session of the Cortes by seven deputies and local cabildos (representative bodies) became elected. Therefore, Peru became the second to last redoubt of the Spanish Monarchy in South America, after Upper Peru. Peru eventually succumbed to patriot armies after the decisive continental campaigns of José de San Martín (1820–1823) and Simón Bolívar (1823–1825). Some of the early Spanish conquistadors that explored Peru made the first attempts for independence from the Spanish crown. They tried