Ironically whole thing started with CIA staged double coup(first one did not work apparently) in Iran during 1953(declassified recently). It was so successful that they copy-pasted it to LATAM and elsewhere. [1]
Interesting fact: Kermit Roosevelt Jr. a grandson of U.S. president Theodore Roosevelt, played the lead role in the CIA-sponsored overthrow of Mohammad Mossadegh, the democratically elected leader of Iran, in August 1953. [2]