Marine Corps Security Force Regiment

Marine Corps Security Force Regiment
Unit name	Marine Corps Security Force Regiment
Dates	1971–present
Country	United States
Branch	United States Marine Corps
Type	Security forces
Role	Fleet and installation protection, specialized security
Garrison	Naval Weapons Station Yorktown, Naval Support Activity Hampton Roads

Marine Corps Security Force Regiment is a United States Marine Corps formation responsible for providing specialized security, antiterrorism, and force protection to high‑value naval assets, installations, and weapons. The Regiment trains and fields detachments capable of protecting Naval Base San Diego, Naval Station Norfolk, strategic arms and munitions sites, and selected overseas facilities. It draws personnel from across the United States Marine Corps and supports joint operations with the United States Navy, United States Special Operations Command, and other federal agencies.

History

The Regiment traces its lineage to Marine security detachments assigned to Atlantic Fleet and Pacific Fleet installations during the early Cold War and post‑World War II era, evolving through organizational changes during the Vietnam War and the Cold War. In the 1970s the force was formalized to address emerging threats to nuclear weapons custody and port security, influenced by incidents such as the 1968 USS Pueblo seizure and strategic arms deployments. The Regiment adapted after the end of the Cold War to counterterrorism priorities highlighted by the 1983 Bombing of the Marine barracks in Beirut and later reorganized following lessons from the September 11 attacks and operations in Iraq War and War in Afghanistan (2001–2021).

Organization and Units

The Regiment is composed of multiple battalions, companies, and detachment elements positioned at major fleet concentration areas and weapons storage sites. Subordinate elements include security battalions based at Naval Support Activity Hampton Roads and detachments at Naval Submarine Base Kings Bay, Naval Base Kitsap, and Naval Weapons Station Yorktown. The unit routinely coordinates with Marine Corps Recruit Depot Parris Island and Marine Corps Base Quantico for personnel pipelines and training certifications. Special mission components support deployments to Naval Air Station Sigonella, Naval Support Activity Souda Bay, and other forward locations.

Missions and Roles

Primary responsibilities include physical security of strategic materiel, antiterrorism/force protection for fleet concentration areas, and security augmentation for United States Strategic Command missions and submarine-launched ballistic missile support. The Regiment provides armed security detachments for munitions storage, escorts for high‑value transfers, and quick reaction forces to defend against sabotage, espionage, and terrorist attacks. It also offers subject matter expertise to commanders on perimeter defense, access control, and integrated security systems for installations such as Naval Weapons Station Charleston and Naval Base Ventura County.

Training and Selection

Marines selected for the Regiment undergo a demanding pipeline emphasizing firearms, close quarters battle, and security operations. Candidates attend specialized schools at Camp Lejeune, Marine Corps Base Camp Pendleton, and Naval Base Coronado for marksmanship, breaching, and convoy operations, with additional certification in chemical, biological, radiological, and nuclear defense taught at Defense Threat Reduction Agency‑affiliated courses. Advanced qualification may involve joint training with United States Secret Service, Federal Bureau of Investigation, and Naval Criminal Investigative Service personnel. Selection standards stress physical fitness, marksmanship (including qualifications on the M27 Infantry Automatic Rifle and service pistols), security clearances tied to Department of Defense requirements, and background investigations.

Equipment and Weapons

Standard issue small arms and force protection equipment include the M27 Infantry Automatic Rifle, M4 carbine, M9 pistol, and designated marksman systems compatible with Marine Corps inventory. Special units employ breaching tools, explosive ordnance reconnaissance gear, and nonlethal options for crowd and access control. Defensive assets integrate surveillance systems, barriers, and command‑and‑control communications interoperable with Naval Integrated Fire Control and base defense networks. When required, detachments coordinate air support from platforms such as the MH-60 Seahawk and indirect fires via naval gunfire from guided missile cruisers or Arleigh Burke-class destroyers.

Notable Operations and Deployments

Detachment elements have supported security during major events and contingencies including responses to attacks on naval installations, protection missions during carrier battle group movements in the Persian Gulf and Arabian Sea, and security augmentation for strategic munitions during periods of heightened tension such as the Cuban Missile Crisis aftermath policies and Cold War crises. The Regiment provided security force augmentation in support of Operation Iraqi Freedom and Operation Enduring Freedom, and has participated in multinational exercises with NATO partners at Exercise Trident Juncture and bilateral drills with the Royal Navy and Japan Maritime Self-Defense Force.

Honors and Insignia

Members of the Regiment are eligible for individual and unit awards consistent with Marine Corps and Navy regulations, including campaign medals related to deployments in support of United States Central Command operations and unit citations for distinguished performance. The Regiment maintains distinctive insignia and qualification badges denoting specialized security qualifications and weapons custody credentials recognized across the Department of the Navy and allied services.

Category:United States Marine Corps units and formations Category:Force protection units