The main goal of the U.S. in the Vietnam War was to contain the spread of communism in line with the Domino Theory.
The primary goal of the United States in the Vietnam War was to contain the spread of communism in Southeast Asia, driven by President Eisenhower's belief in the Domino Theory. The U.S. aimed to prevent the domino effect where one country falling to communism would lead to neighboring countries following suit, as seen in the case of Vietnam during the Cold War.
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