From 1965 to 1966 the Indonesian army led by right wing general Suharto killed 500K-1M suspected "communists" with names US intelligence supplied. They even helped the Army suppress media reports of the genocide.
In the 1980s the US backed El Salvador's government against Marxist gureillas. Troops trained by the US Army killed 75,000 people executing peasants and students en masse. They also executed El Salvador's archbishop Óscar Romero for coming out against the death squads.
In 1966 as President Kwame Nkrumah was on a peacekeeping mission in Vietnam the CIA helped launch a coup removing him from power. In a memo the CIA labeled Nkrumah a threat because he "undermined our interests more than any other black African".