The 5th Marine Division was a United States Marine Corps infantry division which was activated on 11 November 1943 (officially activated on 21 January 1944) at Camp Pendleton, California during World War II. The 5th Division saw its first combat action during the Battle of Iwo Jima in 1945 where it sustained the highest number of casualties of the three Marine divisions of the V Amphibious Corps (invasion force). The 5th Division was to be part of the planned invasion of the Japan homeland before Japan surrendered. Assault troops of the 5th Division were included in the Presidential Unit Citation awarded to the V Amphibious Corps for extraordinary heroism on Iwo Jima from 19 to 28 February 1945. The 5th Division was deactivated on 5 February 1946.
The 5th Division was ordered to be reactivated on 1 March 1966 at Camp Pendleton, California, during the Vietnam War. The division, beginning with the reactivation of Regimental Landing Team 26 (RLT 26), was expected to be fully manned within one year; the 5th Division was never in command of the 26th Marine Regiment (26th Marines) in the war. In December, all three infantry battalions of the 26th Marines were fighting in Vietnam attached to the 3rd Marine Division. By June 1967, the 5th Division was ready to deploy anywhere. It was never intended that the 5th Division would go overseas. It was a force in readiness. But in February 1968, General William C. Westmoreland, U.S. Army, commander of U.S. forces in South Vietnam, asked for help because of the all-out Communist Tet Offensive. The 27th Marine Regiment (27th Marines), 5th Marine Division, was airlifted out on 48 hours notice, with 3,700 Marines. In September, it became the first major combat unit to come home from the Vietnam War. The 5th Marine Division formally deactivated on 26 November 1969.
Description
This campaign was from 2 November 1968 to 22 February 1969. In November 1968 the South Vietnam government with American support began a concentrated effort to expand security in the countryside. This project was known as the "Accelerated Pacification Campaign."
This period covers the election of President Richard M. Nixon and a change of policy brought about by his administration after January 1969 when he announced a coming end to US combat in Southeast Asia and a simultaneous strengthening of South Vietnam's ability to defend itself. Formal truce negotiations began in Paris on January 25, 1969. The period can be characterized as marking time in preparation for an about face. Forty-seven ground combat operations were recorded during this period, the following being the most important:
(1). Operation NAPOLEON in the Dong Ha area initiated previously (1967) by Marine units, terminated on 9 December 1968.
(2). Operation WHEELER WALLOWA by 3d Brigade, 1st Cavalry Division and 196th Infantry Brigade (Light) in north-central Quan Tin Province. This ended on 11 November.
(3). Operation MACARTHUR initiated by 4th U.S. Infantry Division in II Corps tactical zone terminated on 31 January 1969.
(4). Operation COCHISE GREEN conducted by the 173d Airborne Brigade in Binh Dinh Province.
(5). Operation TOAN THANG II consisted of ground operations throughout III CTZ. This was a multi-division operation involving allied forces.
(6). Operation SEA LORDS was a coast and riverine operation. On 6 December Operation GIANT SLINGSHOT was started to disrupt enemy infiltration of materials from the "Parrot's Beak" area of Cambodia. Air operations continued to be important with over 60,000 sorties flown.
