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,
Brazil–Peru border infrastructure, cooperation (mainly in social and security issues), border integration and economic-trade integration. In the field of physical integration, once the Interoceanic Highway, which connects the State of Acre with the Pacific and inaugurated in 2011, the two countries started to study a Bioceanic Railroad project, object of a Brazil-Peru-China Memorandum of Understanding signed In May 2015. These projects are strategic for the integration of the economies of the North and the Midwest of Brazil to Peru and the Pacific. Brazil–Peru border The Brazil–Peru border is the line, located in the Amazon Rainforest, that limits the territories of Brazil and