Answer:
to ensure that they would not ally with the Soviet Union and add to the spread of communism
Step-by-step explanation:
During the Cold War, the U.S. and the Soviet Union were competing for dominance. The United States maintained a close watch on the political system and interfered several times in Chilean politics to ensure the country didn't fall for communism. The same was the case of Iran, where nationalization of oil production by Prime Minister, Mohammed Mossadeq became a threat for the capitalist United States.