What were Americans aims and tactics during the Vietnam?

During the Vietnam War, American aims included preventing the spread of communism in Southeast Asia, supporting the government of South Vietnam, and maintaining U.S. credibility in the Cold War context. Tactics employed by the U.S. included extensive aerial bombing campaigns, the use of ground troops, and counterinsurgency strategies aimed at winning the "hearts and minds" of the Vietnamese people. Additionally, the U.S. relied on technology and firepower, including helicopters and chemical agents like Agent Orange, to combat the Viet Cong and North Vietnamese forces. Despite these efforts, the war faced significant opposition domestically and ultimately ended with the fall of Saigon in 1975.