1942 - 1945
Activated 16 September 1942 at Camp Elliot, California, as the 3rd Marine Division. Deployed during January - Febuary 1943 to Auckland, New Zealand Participated in the following World War II Campaigns:
- Northern Solomons
- Iwo Jima
Deactivated 28 December 1945
Reactivated 7 January 1952 at Camp Pedleton, California as the 3rd Marine Division. Redeployed during August 1953 to Camp Gifu, Japan. Redeployed during February 1956 to Camp Courtney, Okinawa
Redeployed during April-May 1965 to the Republic of Vietnam. Participated in the War in Vietnam April 1965 - November 1969, operating from: Quang Tri Province, Quang Nam Province and Thua Thien Province
Redeployed during November 1969 to Camp Courtney, Okinawa. Elements participated in the Evacuation operations in Vietnam and Cambodia, March - May 1975. Participated in numerous training exercises throughout the 1970s, 80's, and 90's.