The Ñancahuazú Guerrilla or Ejército de Liberación Nacional de Bolivia (National Liberation Army of Bolivia; ELN) was a group of mainly Bolivian and Cuban guerrillas led by the guerrilla leader Che Guevara which was active in the Cordillera Province of Bolivia from 1966 to 1967. The group established its base camp on a farm across the , a seasonal tributary of the Rio Grande, 250 kilometers southwest of the city of Santa Cruz de la Sierra. The guerrillas intended to work as a foco, a point of armed resistance to be used as a first step to overthrow the Bolivian government and create a socialist state. The guerrillas defeated several Bolivian patrols before they were beaten and Guevara was captured and executed. Only five guerrillas managed to survive and flee to Chile.