1st Marine Regiment

1st Marine Regiment
United States Marine Corps · Public domain · source
Unit name	1st Marine Regiment
Dates	1913–present
Country	United States
Branch	United States Marine Corps
Type	Infantry
Size	Regiment
Command structure	1st Marine Division
Garrison	Marine Corps Base Camp Pendleton
Nickname	"Inchon" (historical)

1st Marine Regiment is an infantry regiment of the United States Marine Corps assigned to the 1st Marine Division and based at Marine Corps Base Camp Pendleton. The regiment has participated in major World War I era formations through World War II, Korean War, Vietnam War, and post‑Cold War operations such as Operation Iraqi Freedom and Operation Enduring Freedom. As a maneuver element, the regiment has been subordinated to higher echelons during campaigns at Guadalcanal, Pusan Perimeter, Iwo Jima, and Inchon.

History

The regiment was activated in 1913 during the expansion of the United States Marine Corps and was mobilized for expeditionary deployments related to the Banana Wars, the interwar period in the Caribbean, and training exchanges with the United States Navy. During World War II, elements of the regiment fought on Guadalcanal, which linked to campaigns at Solomon Islands and coordination with the Pacific Fleet, before redeploying for operations in the Central Pacific. In the Korean War, the regiment executed amphibious assault operations associated with the Battle of Inchon and the subsequent advance to the Chosin Reservoir, operating jointly with units from the United States Army and the Republic of Korea Army. In the Vietnam War, battalions served in I Corps tactical zone actions, participating in operations near Da Nang and Hue. Post–Cold War, the regiment supported operations during Operation Desert Storm, counterinsurgency campaigns in Iraq, and stabilization missions in Afghanistan.

Organization and Structure

The regiment is subordinate to the 1st Marine Division and typically comprises three infantry battalions, a headquarters company, and attached support elements drawn from Marine Logistics Group units and Combat Logistics Regiment 1. Primary subordinate battalions have included the 1st Battalion, 1st Marines, 2nd Battalion, 1st Marines, and 3rd Battalion, 1st Marines, which integrate infantry rifle companies, weapons companies, and reconnaissance detachments coordinated with Marine Aircraft Wing aviation for close air support and with Naval gunfire liaison teams. Command relationships are established under Marine Corps doctrine and joint task force constructs when operating with United States Pacific Command or United States Central Command. The regiment trains at Camp Pendleton ranges, conducts amphibious training with the Amphibious Ready Group, and participates in multinational exercises such as RIMPAC and Operation Cobra Gold.

Deployments and Operations

During World War II, the regiment conducted expeditionary landings and island‑campaign operations tied to Operation Cartwheel and interdiction of Imperial Japanese Navy lines. In Korea, the regiment executed the Battle of Inchon landing and sustained high‑intensity combat during the withdrawal from the Chosin Reservoir, coordinating with United Nations Command forces and logistics from the Military Sea Transportation Service. In Vietnam, battalions engaged in counterinsurgency, search‑and‑destroy, and pacification efforts under tactical control of III Marine Amphibious Force, participating in named operations alongside the Army of the Republic of Vietnam. In the 1990s and 2000s, the regiment supported Operation Restore Hope logistics, Operation Iraqi Freedom combat operations including urban and rural counterinsurgency, and Operation Enduring Freedom deployments to Helmand Province and neighboring provinces integrating with NATO and coalition partner units.

Honors and Awards

Elements of the regiment and its subordinate battalions have received unit citations and campaign streamers for actions in World War II, Korean War, and Vietnam War, including Presidential and Navy unit-level recognitions associated with amphibious assault actions at Guadalcanal and Inchon. Individual Marines from the regiment have been decorated with awards such as the Medal of Honor, Navy Cross, and Silver Star for valor during engagements at locations like Chosin Reservoir and Iwo Jima. The regiment carries campaign streamers reflecting participation in major campaigns recognized by the Department of the Navy and incorporated into regimental colors and heraldry.

Notable Commanders and Personnel

Notable leaders and Marines who served in the regiment include commanders and staff officers who later held senior billets in the United States Marine Corps and joint positions within United States Department of Defense, with some recipients of high decorations such as the Medal of Honor and Distinguished Service Cross for actions in Korea and Vietnam. Alumni have included officers who advanced to general officer ranks, served on the Joint Chiefs of Staff staff, or held commands of the I Marine Expeditionary Force and Fleet Marine Force Pacific. Enlisted personnel and noncommissioned officers from the regiment have been recognized in Marine Corps institutional histories and oral histories archived by the Marine Corps University and the National Museum of the Marine Corps.

Category:United States Marine Corps regiments