Chile–Peru relations Peru had a secret defensive alliance with Bolivia, Peru did not declare war on Chile even after Chile invaded the Bolivian port of Antofagasta. War was not declared formally until Chile declared war on both Peru and Bolivia in 1879. Peru declared war on Chile the following day. The war resulted in a Chilean invasion of Peru and the destruction of various Peruvian buildings, cities, a major raid and a two-year occupation of the capital of Peru, Lima. The ultimate result of the war left a deep scar on the three societies involved, and the relations between Peru and Chile
Constituent Congress of Peru, 1822 already underway to support the Northern Liberator, Simón Bolívar, head of Gran Colombia, who had helped Peru to defeat the Spanish who were left throughout southern Peru, including what is now Bolivia. During the Guayaquil conference, Bolívar, San Martín had offered military aid to Peru, which was founded in July 1822 with the dispatch of Colombian troops under the command of Juan Paz del Castillo. In September of that year, Bolívar returned to offer another 4,000 troops, but the brand new Governing Board accepted the reception of only 4,000 rifles. Relations between Peru and Gran Colombia entered its most critical