1922 - 1924
Activated 1 August 1922 at Santo Domingo, Dominican Republic, as the 2nd Battalion, 1st Regiment and assigned to the 2nd Brigade.
Participated in the occupation of the Dominican Republic, Deactivated 20 July 1924.
1941 - 1947
Reactivated 1 March 1941 at Guantanamo Bay, Cuba, as the 2nd Battalion, 1st Marines and assigned to the 1st Marine Division, fleet Marine Force.
Deployed during April 1941 to Parris Island, SC.
Deactivated 14 June 1941.
Reactivated 11 February 1942 at New River, NC, and assigned to the 1st Marines Division, Fleet Marine Force.
Deployed during July 1942 to Wellington, New Zealand.
Participated in the following World War II campaigns:
* New Britain
Redeployed during September 1945 to Tiensin, China.
Participated in the occupation of North China, September 1945-October 1947.
1950 - 1964
Reactivated 4 August 1950 at Camp Lejuene, North Carolina, and assigned to the 1st Marine Division, Fleet Marine Force.
Deployed during August 1950 to Kobe, Japan.
Participated in the Korean War, September 1950-July 1953, Operating from:
* Chosin Reservoir
* East Central
* Western Front
Participated in the defense of the Korean demilitarized zone July 1953 - April 1955.
Relocated to Camp Pendleton, CA in April 1955.
Participated in the Battalion transplacement system between the 1st Marine Division and the 3rd Marine Division during June 1959 - July 1960.
Participated in the Cuban Missile Crisis, October-December 1962.
1965 - 1974
Deployed during November 1965 to the Republic of Vietnam, and assigned to the 3rd Marine Division, Fleet Marine Force.
Participated in the War in Vietnam, November 1965-May 1971, Operating from:
* Hue/Phu Bai
* Da Nang
* Quang Tri
* Thua Thien
* Quang Nam
Detached during April 1971 from the 1st Marine Division, and reassigned to the 3rd Marine Amphibious Brigade, Fleet Marine Force.
Relocated during June 1971 to Camp Pendleton, CA, and reassigned to the 1st Marine Division, Fleet Marine Force.
1975 - 1989
Participated during April - May 1975 in Operation New Arrival, the relocation of refugees from Indochina.
Participated in numerous training exercises during the 1970's and 1980's.
Participated in the Battalion rotation between the 3rd Marine Division on Okinawa and Divisions stationed in the United States during the 1980's.
Deactivated 31 March 1989.
1994 - 2018
Reactivated 9 September 1994 at Camp Pendleton, CA, and assigned to the 1st Marine Division.
Participated from January to June 2003 in Operation Enduring Freedom I with the 15th MEU.
Participated from February to October 2004 in Operation Iraqi Freedom II with 1st Marine Division.
Participated from October 2005 to December 2005 in Operation Iraqi Freedom 04-06 with 2nd Marine Division and the 13th MEU.
Participated in Operation Enduring Freedom, Afghanistan, October 2010 - May 2011.