From the Summary: "In August 2012, Colombian President Juan Manuel Santos announced that the government was engaged in exploratory peace talks with the violent leftist insurgent group, the Revolutionary Armed Forces of Colombia (FARC), in a bid to resolve a nearly 50-year internal armed conflict. The secret, initial dialogue between the Santos government and the FARC's leadership led to the opening of formal peace talks with the FARC--the oldest, largest, and best-financed guerrilla organization in Latin America. Formal talks began in Oslo, Norway, in October 2012 and then, as planned, moved to Havana, Cuba, where they continued for more than 50 rounds."
CRS Report for Congress, R42982
Congressional Research Service: https://crsreports.congress.gov/