Operation Junction City was an 82-day military operation conducted by United States and Republic of Vietnam (RVN or South Vietnam) forces begun on 22 February 1967 during the Vietnam War. It was the largest U.S. airborne operation since Operation Varsity in March 1945, the only major airborne operation of the Vietnam War, and one of the largest U.S. operations of the war. The operation was named after Junction City, Kansas, home of the operation's commanding officer.