Learn about the war that enmeshed the United States in a battle against communism in Southeast Asia for more than twenty years.

The USA became involved in Vietnam because it feared the spread of communism. The USA were unable to defeat the Vietcong and were met with growing opposition to the war back home.

Over fifty years ago, in an address to the nation from the Oval Office, President Nixon announced that US and South Vietnamese forces were conducting a limited operation against the North Vietnamese and Vietcong sanctuaries inside Cambodia that were being used to attack allied forces across the border in South Vietnam.

Research guide that explores all the different facets of the Anti-Vietnam War movement.

The movement against U.S. involvement in the Vietnam War began small–among peace activists and leftist intellectuals on college campuses–but gained national prominence in 1965, after the United States began bombing North Vietnam in earnest.

The Vietnam-era antiwar movement may count as the largest sustained protest movement in the history of the United States. Opposition to US military involvement in Southeast Asia began in the 1950s and started to attract media attention in 1963 as the Kennedy Administration pushed combat troops into Vietnam. Campus protests date from 1965, the year SDS organized several large demonstrations.