1942 – 1945

• - Activated 1 May 1942 at New River, North Carolina, as 3d Training Battalion, Division Special Troops, 1st Marine Division, Fleet Marine Force
• - Redesignated 17 June 1942 as 2d Battalion, 3d Marines, Fleet Marine Force
• - Deployed during August-September 1942 to Tutuila, American Samoa, and reassigned to 2d Marine Brigade
• - 3d Marines reassigned during March 1943 to Fleet Marine Force
• - Redeployed during May 1943 to Auckland, New Zealand
• - Reassigned during June 1943 to 3d Marine Division
• - Redeployed during July-August 1943 to Guadalcanal
• - 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

1951 – 1960

• - Reactivated 20 July 1951 at Camp Pendleton, California and assigned to 3d Marine Brigade, Fleet Marine Force
• - Reassigned during January 1952 to 3d Marine Division
• - Deployed during July-August 1953 to Camp Fuji-McNair, Japan
• - Redeployed during March 1957 to Camp Sukiran, Okinawa
• - Redeployed during March 1958 to Camp Sukiran, Okinawa
• - Relocated during November 1959 to Camp Pendleton, California and reassigned to 1st Marine Division, Fleet Marine Force

1961 – 1969

• - Redeployed during January 1961 to Camp Schwab, Okinawa and reassigned to 3d Marine Division, Fleet Marine Force
• - Deployed at various times between 1961 – 1967 as the Battalion Landing Team of the Seventh Fleet
• - Redeployed during April 1965 to Da Nang, Republic of Vietnam
• - Participated in the War in Vietnam, April 1965 – October 1969, operating from:
• Da Nang
• Camp Carroll
• Quang Tri
• Cam Lo
• A Shau
• Khe Sanh
• - Relocated during October 1969 to Camp Pendleton, California and reassigned to 5th Marine Amphibious Brigade, Fleet Marine Force