WORLD HISTORY

Detailed explanation-1: -The US justified its military intervention in Vietnam by the domino theory, which stated that if one country fell under the influence of Communism, the surrounding countries would inevitably follow. The aim was to prevent Communist domination of South-East Asia.

Detailed explanation-2: -domino theory, also called domino effect, theory adopted in U.S. foreign policy after World War II according to which the “fall” of a noncommunist state to communism would precipitate the fall of noncommunist governments in neighbouring states.

Detailed explanation-3: -During the Cold War, the U.S. Government feared that communism would spread and threaten democracy around the world. In Vietnam, the United States committed to battling communism financially at first, by supporting South Vietnam – who fought for Vietnam to be aligned with western allies like the United States.

Detailed explanation-4: -Opposition to the war in the United States bitterly divided Americans, even after President Richard Nixon ordered the withdrawal of U.S. forces in 1973. Communist forces ended the war by seizing control of South Vietnam in 1975, and the country was unified as the Socialist Republic of Vietnam the following year.

Detailed explanation-5: -In 1947, President Harry S. Truman pledged that the United States would help any nation resist communism in order to prevent its spread. His policy of containment is known as the Truman Doctrine.