Colombia–Peru relations
Colombian–Peruvian relations is the relationship between two South American states, Colombia and Peru. Both nations are members of the Community of Latin American and Caribbean States, Lima Group, Organization of Ibero-American States, Organization of American States, Pacific Alliance and the United Nations. History. The two nations share a common heritage. Both countries were part of the Spanish Empire and use Spanish as official language in two countries, the legacy left back by the Viceroyalty of Peru and Viceroyalty of New Granada. Both countries participated in later Latin American wars of independence against Spain and achieved  its independence, forming Gran Colombia and Peru. However, since independence, two countries have up-and-down relations. Gran Colombia–Peru War. Two countries fought a bloody war from 1828 to 1829 over territorial dispute. Both Peru and Gran Colombia had land claims over modern-day Ecuador, resulted with war and territorial claim. The war eventually ended with no significant territorial change, but Gran Colombia's collapse in 1831 led to the independence of Colombia, Venezuela and Ecuador. Thus, Peru's territorial dispute with Gran Colombia transferred to Ecuador. Leticia dispute. Leticia, the city that lies in modern Colombia, was founded  by the Peruvians, however the claim over the city only began in late 19th century due to the losing pride post War of the Pacific. However, Colombia claimed that it had been Colombian since their Viceroyalty. This led to the Leticia War that happened for a year over territorial claim. This resulted with Colombianization of Leticia and Putumayo regions and expulsion of Peruvians. Víctor Raúl Haya de la Torre. Víctor Raúl Haya de la Torre, a Peruvian diplomat aligned to left-wing American People's Revolutionary Alliance, gained sanctuary after his faction lost a one-day civil war in Peru  on 3 October 1949 by the Colombian government granted him asylum. However, Peru rejected this action and it led to a standoff in relations. Colombia maintained that according to the Conventions in force - the "Bolivian Agreement of 1911 on Extradition", the "Havana Convention of 1928 on Asylum", the Montevideo Convention of 1933 on Political Asylum - and according to American International Law, they were entitled to decide if asylum should be granted and their unilateral decision on this was binding on Peru. The submissions from Colombia was rejected by the International Court. Internal conflicts. With both countries being plundered from the  unstable situation in both sides since 1960s, Colombian–Peruvian relations significantly improved. Colombia and Peru share a long and uncontrollable border, which prompted militia group like Shining Path and Revolutionary Armed Forces of Colombia to become active against the government, and growing drug trafficking activities. In response, Colombia and Peru have cooperated in their battles against drug cartels and left-wing militia groups. Two countries also share similar threats from left-wing terrorism, and its war on drug cartels. As both countries stand still in the same struggle, increasing collaboration is expected in the future and Peru had sought to  use Colombia's FARC experience to battle the Shining Path. Immigration movement. Colombians formed at least 5% of population immigrating to Peru. Peruvians also formed a small immigrant group in Colombia.