Based on 1976 CIA documents stated that from 1960 to the early 1970s, the plans were developed among international security officials at the US Army School of the Americas and the Conference of American Armies to deal with political dissidents in South America. A declassified CIA document dated 23 June 1976, explains that "in early 1974, security officials from Argentina, Chile, Uruguay, Paraguay and Bolivia met in Buenos Aires to prepare coordinated actions against subversive targets." US officials were aware of what was going on.