Cooper-Church Amendment restricts U.S. combat in Cambodia

A U.S. directive authorized the deployment of U.S. and South Vietnamese ground forces into Cambodia. The campaign widened the war into a formally neutral state and provoked intense opposition in the...

Nixon announced a cross-border ground incursion aimed at North Vietnamese and NLF base areas. The action broadened the war, provoked mass protests in the United States and led Congress to restrict...

National Guard troops fired on students during protests against the Cambodia incursion, killing Allison Krause, Jeffrey Miller, Sandra Scheuer and William Schroeder. The shootings intensified the...

Tens of thousands gathered in Washington, D.C., after the Cambodian campaign and the deaths of students at Kent State. The protest connected opposition to the foreign war with domestic state...

Mississippi police and highway patrol officers fired into Alexander Hall during campus unrest, killing Phillip Gibbs and James Green and wounding others. The shootings followed Kent State but received...

Operation Lam Sơn 719 sent South Vietnamese forces into Laos to disrupt supply routes, with U.S. air support but no U.S. ground combat units. The operation suffered major losses and demonstrated the...

South Vietnamese ground forces crossed into Laos with U.S. air and logistical support, seeking to disrupt the Hồ Chí Minh Trail. The operation tested Vietnamization and Laos’s sovereignty; Laotian...

South Vietnamese forces withdrew from Laos after heavy losses. The operation failed to permanently sever supply routes and exposed the limits of U.S. claims that Vietnamization could sustain major...

Veterans gathered in Washington for a week of protest, testimony and public actions against the war. The protest challenged the claim that opposition came only from civilians and used veterans’...

Hundreds of veterans opposed to the war gathered in Washington and threw medals or ribbons toward the Capitol. Their action challenged the idea that dissent was disloyal to soldiers and drew attention...