Second Battalion Seventh Marines is garrisoned on board the Marine Corps Air Ground Combat Center at 29 Palms, CA. 2d Battalion, 7th Marines activated 01 January 1941 at Guantanamo Bay, Cuba, as the 2d battalion, 7th Marines and was assigned to the 1st Marine Brigade, Fleet Marine Force. It was reassigned during February 1941 to the 1st Marine Division, and relocated during April 1941 to Paris Island, South Carolina, and relocated during September 1941 to New River, North Carolina. The Battalion was attached during March 1942 to the 3rd Marine Brigade, and deployed during April 1942 to Samoa. It was detached during August 1942 from the 3rd Marine Brigade and reassigned to the 1st Marine Division. It participated in the following World War II campaigns: Guadalcanal; Eastern New Guinea; New Britain; Peleliu; and Okinawa. It participated in the occupation of North China, September 1945 - January 1947. The unit relocated during January 1947 to Camp Pendleton, and deactivated 26 February 1947.
The Battalion was reactivated 17 August 1950 at Camp Pendleton, California, and assigned to the 1st Marine Division. It deployed during September 1950 to the Republic of Korea and participated in the Korean War from September 1950 through July 1953, operating from Inchon-Seoul, Chosin Reservoir, East Central Front, and Western Front. It participated in the defense of the Korean Demilitarized Zone, July 1953 - March 1955, and relocated during March 1955 to Camp Pendleton.
It deployed during June 1965 to Camp Schwab, Okinawa, and participated in the War in Vietnam, July 1965 - October 1970, operating from Qui Nhon, Chu Lai, Dai Nang, Dai Loc and An Hoa.
The Battalion relocated during October 1970 to Camp Pendleton, and was reassigned to the 5th Marine Amphibious Brigade. Reassigned during April 1971 to the 1st Marine Division, it participated in the battalion rotation between the 3rd Marine Division on Okinawa and divisions stationed in the United States during the 1980s. It relocated during January 1990 to Twenty-nine Palms, California, and participated in Operations Desert Shield and Desert Storm, Southwest Asia, August 1990 - March 1991, and relocated during March 1991 to Twenty-nine Palms, California.
The battalion continued to participate in the rotation between 3rd Marine Division on Okinawa and divisions stationed in the United States from March 1991 – June 2005. From July 2005 - January 2006 and January 2007 – August 2007, the battalion was assigned to Regimental Combat Team 6 and participated in Operation Iraqi Freedom, operating around the Fallujah area. Upon returning to Twenty-Nine Palms, California the battalion started predeployment workup for another tour. In April 2008, the battalion deployed to Afghanistan to participate in Operation Enduring Freedom.
From April 2008 to November 2008 the Battalion deployed in support of Operation Enduring Freedom 08 and was assigned to Combined Security Transition Command - Afghanistan, and later to the Special Purpose MAGTF - Afghanistan. Operating from locations in Northern Helmand and Eastern Farah Provinces, the Battalion engaged in heavy fighting with insurgent forces while conducting full-spectrum COIN with a focus on development of the Afghan National Police.
The Battalion deployed to Okinawa, Japan in support of the 31st Marine Expeditionary Unit (MEU) from January to July of 2010. During this deployment the Battalion participated in Operation Cobra Gold 2010 and Operation Balikatan 2010 in the countries of Thailand and Republic of the Philippines. The Battalion again deployed to Okinawa, Japan in support of the 31st MEU from June to December of 2011. During this deployment the Battalion participated in Talisman Saber 2011 and PHIBLEX 2011 in the countries of Australia and Republic of the Philippines.