Activated 20 November 1917 at Quantico, Virginia as the 9th Regiment

Deployed during December 1917 to Guantanamo Bay, Cuba, and attached to the 3rd Provisional Brigade

Relocated during August 1918 to Fort Crockett, Galveston, Texas, and detached from 3rd Provisional Brigade

Relocated during April 1919 to Philadelphia, Pennsylvania

Deactivated 25 April 1919


Reactivated 12 February 1942 at Camp Elliot, San Diego, California as the 9th Marines, 2nd Marine Division, Fleet Marine Force

Redesignated 3 August 1942 as the 9th Marines, Amphibious Corps, Pacific Fleet

Reassigned during September 1942 to the 3rd Marine Division, Fleet Marine Force



Deployed during February 1943 to Auckland, New Zealand

Participated in the following World War II Campaigns:

Bougainville    Northern Solomons    Guam    Iwo Jima

Relocated during December 1945 to Camp Pendleton, California

Deactivated 31 December 1945



Reactivated 1 October 1947 on Guam as the 9th Marines, Fleet Marine Force

Deployed during November 1948 to Tsingtao, China

Redeployed during December 1948 to Shanghai, China

Relocated during May 1949 to Camp Lejeune, North Carolina, and assigned to the 2nd Provisional Marine Regiment

Deactivated 17 October 1949



Reactivated 17 march 1952 at Camp Pendleton, California, as the 9th Marines, 3rd Marine Division, Fleet Marine Force

Deployed during October 1953 to Camp Gifu, Japan

Redeployed during February 1954 to Camp Shinodayama, Japan

Redeployed during July 1955 to Camp Napunja, Okinawa

Redeployed during January 1956 to Camp Sukiran, Okinawa

Elements participated in the deployment to Udorn, Thailand, May-July 1962



Deployed during March 1965 to Da Nang, Republic of Vietnam

Participated in the War in Vietnam, March 1965  August 1969

1st Bn 9th Marines - June 16, 1965 - September 1966 and from December 1966 - July 1969

Operating from: Da Nang, Phu Bai, DMZ, Dong Ha, Camp Carroll, Khe Sanh, A Shau Valley, Cam Lo, The Rock Pile, LZ Stud and Camp Vandegrift

Participated in over 35 named operations while in Vietnam including Deckhouse 5, Buffalo, Kentucky, Scotland (KS), Pegasus (KS) and Dewey Canyon

Relocated during August 1969 to Camp Schwab, Okinawa and reassigned to the 9th Marine Amphibious Brigade, Fleet Marine Force 

Reassigned during November 1969 to the 3rd Marine Division 




Elements of the Regiment participated in various support operations in the Southeast Asia  1971 - 1975

Elements of the Regiment participated in the Southeast Asia Evacuation "Frequent Wind", April 1975

Deployed at various times as Battalion Landing Team with the Seventh Fleet from October 1969 - January 1980

Participated in Phase III, unit rotation to Camp Pendleton March 1980

Deployed to Okinawa September 1981 - March 1983

Deployed to WestPac with Philbron I from June- December 1969

Deployed in May 1991 to WestPac/South West Asia and participated in the following operations

Operation Fiery Vigil

Operation Desert Storm


Deployed in September 1993 to WestPac/Somalia and participated in the following operations

Unosom II/Continue Hope

Operation More Care

Operation Show Care

        Re-designated 2nd Battalion 1st Marines September 9, 1994, Camp Pendleton, California



        Deactivated status 1995-2004

        Alpha Company deploys to Iraq April 12, 2006

        1st Battalion 9th Marines Activated April 18, 2007 at Camp Lejeune NC

        2nd Battalion 9th Marines Activated July 13, 2007 at Camp Lejeune NC