What was Operation Menu in the Vietnam War?

Operation Menu was a covert U.S. bombing campaign conducted from 1969 to 1970 during the Vietnam War, targeting North Vietnamese supply lines and bases in neighboring Cambodia. The operation was aimed at disrupting the Ho Chi Minh Trail, which was used for transporting troops and supplies to South Vietnam. It was initially kept secret from the American public and Congress, leading to controversy and criticism when it was later revealed. The operation marked an escalation of U.S. involvement in Southeast Asia and illustrated the complexities of the war beyond Vietnam's borders.