USA 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: -The policy of containment had failed militarily. Despite the USA’s vast military strength it could not stop the spread of communism . The guerrilla tactics used by the Vietcong and their absolute commitment to the cause, far outweighed the desire of the Americans to keep going.

Detailed explanation-3: -The doctrine of containment argued that all-out war should be avoided, but the US should pledge itself to stopping any new communist governments, or preventing any existing communist governments from expanding.

Detailed explanation-4: -The Truman Doctrine, also known as the policy of containment, was President Harry Truman’s foreign policy that the US would provide political, military, and economic aid to democratic countries under the threat of communist influences in order to prevent the expansion of communism.

Detailed explanation-5: -The Vietnam War (1955-1975) was a military conflict between North Vietnam (supported by China and the Soviet Union) and South Vietnam (supported by the United States, South Korea, Australia, and several other US allies). It is often described as a proxy war of the Cold War era.