Not only had the USA failed to stop Vietnam falling to communism, but their actions in the neighbouring countries of Laos and Cambodia had helped to bring communist governments to power there too
Having presented the war in Vietnam as a moral crusade against communism, the atrocities committed by US military in terms of killing and the use of chemical weapons, had tarnished America's image at home and abroad
The war had cost 58,000 American and 1-4 million Vietnamese lives, affected 700,000 American veterans, cost America over one hundred billion dollars, and damaged reputation and morale at home
After Vietnam, the policy of containment was replaced by a period of détente, a thawing in the tensions of the Cold War and gradually relations between the USA and the USSR/China improved