The domino theory dominated the US foreign policy thinking during the 1970s and was a major argument used by the American administration to justify the involvement of the US military in the Vietnam War . Applying the domino theory to the case of Vietnam War , it was argued that if the communists had taken control of South Vietnam , then the other Southeast Asian countries like Cambodia , Indonesia , Laos , Malaysia , Myanmar , and Thailand would follow . Although neither Olson nor Roberts has published...











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