As elements of the 1st Brigade, the 1st and 2nd Battalions 327th Infantry deployed to Vietnam in 1965, where they were joined by the rest of the division in late 1967. The 2nd Battalion, 327th Infantry, was the last unit of the 101st Airborne to leave Vietnam, departing in April 1972, making it the longest serving unit in combat during the Vietnam War. While still at Fort Campbell, Kentucky, the remaining elements of the 101st were severely stripped of personnel to support the war effort.