Nevertheless, sectors of the army opposed the agreements, as much of The Uribe as those of Corinto were responsible for attacks against the life of the main leaders; Iván Marino Ospina, Antonio Navarro, Carlos Pizarro, Marcos Chalita, etc.
Celeyta attributes the beginning of her activism in human rights to the 1985 Palace of Justice siege, in which M-19 guerrillas took the Supreme Court of Justice of Colombia hostage, killing 11 of its 25 justices.
In Latin America, groups that became actively involved in terrorism in the 1970s and 1980s included the Nicaraguan Sandinistas, the Peruvian Shining Path, and the Colombian 19th of April Movement.
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Stefan M. Audrey describes the Sandinistas, Shining Path, 19th of April Movement, and Revolutionary Armed Forces of Colombia (FARC) as the main organizations involved in left-wing terrorism in Latin America during the 1970s and 1980s.
In 1974, the 19th of April Movement (M-19), a Colombian guerrilla group, came into the public scene and claimed that its struggle was a reaction to what it called the illegitimacy of the 1970 elections, the nation's bipartisan political system, and the National Front agreement that had supported them.
Electoral alliances between the new party, the AD/M19 and local right-wing politicians were established.
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The presidents of the National Constituent Assembly were Alvaro Gómez Hurtado on behalf of the Conservative Party, Horacio Serpa from the Liberal Party and Antonio Navarro from the M-19 movement.
In 1980 Asencio was - along with a dozen other diplomats - held hostage for 61 days when members of the guerrilla group 19th of April Movement (M-19), led by Rosemberg Pabón, seized the Dominican Republic's embassy in Bogotá.
In late 1985 Cerpa travelled to Colombia, where he headed the "Leoncio Prado" Squad, one of three MRTA squads that participated in a joint military venture with Colombia's M-19 movement and Ecuador's ¡Alfaro Vive, Carajo! and Quintín Lame guerrillas.