1942-1946

 Activated 1 October, 1942 at Camp Elliot, San Diego, CA as I Marine Amphibious Corps.
- Deployed October 1942 to Noumea, New Caledonia.
- Redesignated 15 April, 1944 as III Marine Amphibious Corps.
- Participated in the following WWII Campaigns:

• Bougainville
• Northern Solomans
• Guam
• Palaus
• Okinawa

- Redeployed September 1945 to Tiestim, China.
- Participated in occupation of North China, September 1945 - June 1946.
Deactivated 10 June, 1946.

1965-1987

Reactivated 6 May, 1965 at Na Dang, Republic of Vietnam as III Marine Expeditionary Force.
- Redesignated 7 May, 1965 as III Marine Aphibious Force
- Participated in PWAR in Vietnam May 1965 - April 1971; Operating From:
 

• Quang Tri
• Thua Thien
• Quang Nam
• Quang Tin
• Quang Ngai

Deployed April 1971, Camp Courtney, Okinawa
 

1988-2006

Redesignated 5 February, 1988 as III Marine Expeditionary Force.
- Elements participated in Operations in Southwest Asia and Iraq from September 1990 -  April 1991 and May-June 1991

• Desert Shield
• Desert Storm
• Provide Comfort

- Elements participated in Operation Sea Angel, Bangladesh: May-June 1991
- Elements participated in Operation Fiery Vigil, Phillipines: June 1991
- Elements participated in Operation Restore Hope and Continue Hope, Somalia: December 1992 - March 1994
- Elements participated in Global War on Terrorism: 2001 - 2007
- Elements participated in Operation Unified Assistance in response to the Tsunami Disaster, Southeast Asia: December 2004 - February 2005