3rd Battalion, 2nd Marines

3rd Battalion, 2nd Marines
Unit name	3rd Battalion, 2nd Marines
Dates	1 March 1941 – present
Country	United States of America
Branch	United States Marine Corps
Type	Infantry battalion
Role	Rifle battalion, close combat
Size	~1,000 personnel
Command structure	2nd Marine Regiment, 2nd Marine Division, II Marine Expeditionary Force
Garrison	Marine Corps Base Camp Lejeune, North Carolina
Nickname	"Betio", "3/2"
Battles	World War II, Battle of Tarawa, Korean War, Vietnam War, Gulf War, Operation Iraqi Freedom, Operation Enduring Freedom (2001–present), Global War on Terrorism
Decorations	Presidential Unit Citation (United States), Navy Unit Commendation, Republic of Vietnam Cross of Gallantry

3rd Battalion, 2nd Marines is a rifle battalion of the United States Marine Corps assigned to 2nd Marine Regiment and 2nd Marine Division based at Marine Corps Base Camp Lejeune, North Carolina. The battalion has participated in major twentieth and twenty-first century campaigns including World War II, Korean War, Vietnam War, the Gulf War, Iraq War, and operations in Afghanistan. Its organization, doctrine, and deployments tie into II Marine Expeditionary Force concepts and Marine Air-Ground Task Force operations.

History

Activated during the build-up to World War II, the battalion fought in the Gilbert and Marshall Islands campaign and earned distinction at the Battle of Tarawa as a component of 2nd Marine Division under commanders drawn from Marine Corps Recruit Depot Parris Island and Marine Corps Base Quantico. Postwar reorganization saw the unit deployed for the Korean War as part of amphibious operations linked to Inchon, and later rotated through counterinsurgency campaigns in Vietnam War alongside units from III Marine Amphibious Force and 1st Marine Division. During the post-Cold War era the battalion mobilized for Operation Desert Shield and Operation Desert Storm in concert with U.S. Central Command and returned to conduct stability operations during Operation Iraqi Freedom with missions coordinated with Multinational Force — Iraq and Combined Joint Task Force 7. In the Global War on Terrorism the battalion executed persistent security and counterinsurgency missions in Al Anbar Governorate, Helmand Province, and partnered with NATO elements and host-nation security forces.

Organization and Structure

The battalion is organized into a headquarters element and three rifle companies, a weapons company, and support elements consistent with Marine Corps infantry battalion tables of organization and equipment. Companies are designated as Alpha, Bravo, and Charlie, with a Weapons Company incorporating machine gun, mortar, and anti-armor platoons using doctrine from Marine Corps Warfighting Publication 3-11. The Headquarters and Service Company integrates logistics, communications, intelligence, and medical platoons aligned with Combat Logistics Regiment 2. Command relationships connect the battalion to 2nd Marine Regiment headquarters, which coordinates with II Marine Expeditionary Force and higher echelons such as U.S. Fleet Forces Command for amphibious tasking.

Deployments and Operations

Deployments have ranged from large-scale amphibious assaults to partnered counterinsurgency and embassy security operations. In World War II the battalion’s actions at Tarawa and the Gilbert Islands exemplify early amphibious doctrine alongside Fleet Marine Force Pacific and carriers from Task Force 52. In the Vietnam War the battalion operated in I Corps in coordination with 1st Marine Division and conducted operations near Da Nang and Quang Tri Province. During the Gulf War the unit supported maneuver operations tied to Operation Desert Storm under U.S. Central Command. In Iraq the battalion conducted counterinsurgency, stability, and route security missions in Fallujah and Ramadi as part of surge operations directed by Multi-National Force – Iraq and worked with Iraqi Security Forces. In Afghanistan the battalion executed partnered operations with International Security Assistance Force elements and trained Afghan National Army units in population-centric security missions.

Training and Readiness

Training follows Marine Corps expeditionary warfare and small-unit tactics, including live-fire exercises on ranges at Marine Corps Air Ground Combat Center Twentynine Palms, amphibious training with Amphibious Squadron elements, and combined-arms rehearsals integrating close air support from Marine Aviation assets such as F/A-18 Hornet and AV-8B Harrier II. Pre-deployment workups emphasize Marine Air-Ground Task Force integration, urban operations training with Marine Corps Urban Warfare Instruction syllabi, and convoy/route-clearance skills developed with Expeditionary Warfare School doctrine. Readiness assessments use standards promulgated by Training and Education Command and are validated through exercises like Combined Joint Task Force training events and Sustainment Training rotations.

Equipment and Weapons

As an infantry battalion the unit fields standard United States Marine Corps small arms and crew-served weapons including the M27 Infantry Automatic Rifle, M4 carbine, M240 machine gun, M2 Browning, and MK 19 grenade launcher. Anti-armor capability has included the BGM-71 TOW and Javelin (missile), while indirect fires are provided by the 60mm and 81mm mortars and supported by artillery from 2nd Battalion, 10th Marines and aviation-delivered fires from AH-1W SuperCobra and UH-1Y Venom platforms. Mobility and logistics employ vehicles such as the Medium Tactical Vehicle Replacement, AAVP7A1 amphibious assault vehicles, and coordination with Navy Expeditionary Logistics for ship-to-shore movement.

Notable Personnel and Honors

Individuals who served in the battalion have gone on to prominent commands and decorations within the United States Marine Corps and joint services, receiving awards like the Silver Star, Bronze Star Medal, and Purple Heart. The unit has been cited with collective honors including the Presidential Unit Citation (United States), Navy Unit Commendation, and foreign awards such as the Republic of Vietnam Cross of Gallantry for actions during Vietnam War. Alumni have served at senior posts in Marine Corps Combat Development Command, Joint Chiefs of Staff staff positions, and with U.S. Special Operations Command task forces.

Memorials and Legacy

Memorials and regimental histories commemorate the battalion’s actions with displays at Marine Corps Base Camp Lejeune museums, plaques referencing battles like Tarawa and Iwo Jima in broader exhibits, and unit histories preserved by organizations such as the Marine Corps Association and National Museum of the Marine Corps. The battalion's legacy informs contemporary infantry doctrine taught at School of Infantry and shapes commemorations during Memorial Day observances and Veterans Day events where veterans and civic institutions honor service and sacrifice.

Category:Infantry battalions of the United States Marine Corps