1962-1977: Starting in 1962 the CIA begins interfering in Chilean elections, turning in 1964 to incubation of the military junta that in 1973 put Augusto Pinochet into power after a CIA backed overthrow of Salvador Allende (having failed to buy his opponents elections and a failed coup attempt in 1970, among others). Salvador's government was replaced by a military dictatorship that suppressed and brutalized the country until 1990, with full US knowledge and complicity, and included assistance in the murder of political opponents. Allende's crime:
The US was supporting "anti-communist" factions in Chile as early as 1950. CIA activities recieved significant funding from the business community (allegedly Pepsi, from what I've read).
The AFL-CIO was also involved, continuing its long history of working against foreign labour unions.