The National Liberation Army (Spanish: Ejército de Liberación Nacional, ELN) is a Marxist–Leninist guerrilla group involved in the continuing Colombian conflict, which has existed in Colombia since 1964. The ELN advocate a composite communist ideology of Marxism-Leninism and liberation theology. In 2013, it was estimated that the ELN forces consisted of between 1,380 and 3,000 guerrillas. According to former ELN national directorate member Felipe Torres, one fifth of ELN supporters have taken up arms. The ELN has been classified as a terrorist organization by the governments of Colombia, the United States, Canada, the European Union and Venezuela's National Assembly. History Formation The National Liberation Army of Colombia (Ejército de Liberación Nacional, ELN) was founded in 1964, by Fabio Vásquez Castaño and other Colombian rebels trained in Cuba. Later, the ELN was headed by a series of Roman Catholic priests, exponents of Liberation Theology. Most notable was Camilo Torres Restrepo (1929–66), a well-known university professor (egalitarian and Marxist–Leninist) who was openly critical of the what he considered grossly unequal income among the social classes of Colombia. His attraction to the radical ideas of Liberation Theology led him to join the ELN, a guerrilla army intent upon effecting the revolutionary praxis of liberation theology among the poor people of Colombia. Father Camilo was killed in his first combat as an ELN guerrilla, and so became the exemplar ELN soldier, to be emulated by ELN guerrillas and other liberation-theology priests from the lower ranks of the Roman Catholic priesthood. In the years following its foundation, it brought together more students and young activists from cities than peasants, a social composition that distinguishes it from the FARC guerrillas, who are essentially peasants. In the 1970s, after suffering military defeat and internal crises, the ELN was commanded by the Spanish priest Father Manuel Pérez Martínez (1943–98), alias El Cura Pérez, who shared leadership with Nicolás Rodríguez Bautista, alias "Gabino". El Cura Pérez presided over the National Liberation Army as one of its most recognized figures until he died of hepatitis B in 1998. He was instrumental in establishing the ideology of the ELN, a composite of Cuban revolutionary theory and liberation theology that proposes the establishment in Colombia of a Christian and communist regime to resolve the socioeconomic problems of chronic political corruption, poverty, and the exclusion of most Colombians from their country's government. The ELN guerrillas survived the heavy fighting in the Colombian Army's