What was the main goal of the Vietnam War?

The primary objective of the Vietnam War was to prevent the spread of communism in Southeast Asia. At the time, the United States adhered to the "Domino Theory," which posited that if one country fell to communism, neighboring countries would follow suit, resulting in a broader regional shift towards communism. This belief drove the U.S. to engage militarily in Vietnam in an effort to support the South Vietnamese government against the communist North, which was backed by the Soviet Union and China. The overarching goal was to contain communism and promote a stable non-communist regime in Vietnam, reflecting a significant aspect of U.S. Cold War policy. This commitment to resistance against communism was evident in the extensive military involvement and resources deployed in the region during the war.