What event in 1968 prompted anti-war protests to increase throughout the United States?

The Tet Offensive began in January 1968, when North Vietnamese and Viet Cong forces launched attacks across South Vietnam. Although the offensive was eventually repelled, it contradicted optimistic claims that the war was nearing victory and increased public doubts about U.S. policy, helping anti-war protests grow. The correct choice is the Tet Offensive.

AI-written and checked against the verified answer.