The 3rd Marine Division is a division of the United States Marine Corps based at Camp Courtney, Marine Corps Base Camp Smedley D. Butler in Okinawa, Japan. It is one of three active duty infantry divisions in the Marine Corps and together with the 1st Marine Aircraft Wing (1stMAW) and the 3rd Marine Logistics Group forms the III Marine Expeditionary Force. The division was first formed during World War II and saw four years of continuous combat in the Vietnam War. Today, elements of the 3rd Marine Division are continuously forward deployed and forward postured to carry out the US Government's mission of a Free and Open Indo-Pacific in conjunction with its sister services.
The 5th Marine Division was a United States Marine Corps ground combat division which was activated on 11 November 1943 at Camp Pendleton, California during World War II. The 5th Division saw its first combat action during the Battle of Iwo Jima in 1945 where it sustained the highest number of casualties of the three Marine divisions of the V Amphibious Corps. The 5th Division was to be part of the planned invasion of the Japan homeland before Japan surrendered. Assault troops of the 5th Division were included in the Presidential Unit Citation awarded to the V Amphibious Corps for extraordinary heroism on Iwo Jima from 19 to 28 February 1945. The 5th Division was deactivated on 5 February 1946.
The 3rd Marine Logistics Group is the Logistics Combat Element (LCE) for III Marine Expeditionary Force currently headquartered on Camp Kinser, Marine Corps Base Smedley D. Butler, Okinawa, Japan. 3rd MLG provides combat service support (CSS) to III MEF units above the organic capability. CSS is the essential capabilities, functions, activities, and tasks necessary to sustain all elements of operating forces in theater at all levels of war. Combat service support includes, but is not limited, to supply, maintenance, transportation, general engineering, health services, and other services required by aviation and ground combat forces to permit those units to accomplish their missions.
The 1st Marine Logistics Group is a logistics unit of the United States Marine Corps and is headquartered at Marine Corps Base Camp Pendleton, California, with several subordinate elements located at Marine Corps Air Station Yuma and Marine Corps Air Ground Combat Center Twentynine Palms. It is the logistics combat element of the I Marine Expeditionary Force.
The 12th Marine Littoral Regiment is a Littoral regiment of the United States Marine Corps based at Camp Smedley Butler, Okinawa, Japan. Nicknamed "Thunder and Steel," the regiment falls under the command of the 3rd Marine Division.
The 3d Marine Littoral Regiment is a regiment of the United States Marine Corps that is optimized for littoral maneuver in the Indo-Pacific Theater. Based at Marine Corps Base Hawaii, the regiment falls under the command of the 3rd Marine Division and the III Marine Expeditionary Force. It was known as the 3rd Marine Regiment from 1914 to 2022, when it was renamed as part of the Commandant of the Marine Corps' Force Design 2030 initiative. The 3d MLR has participated in the 2022 and 2023 Balikatan exercises in Northern Luzon, Philippines.
2nd Battalion, 3rd Marines (2/3) was an infantry battalion in the United States Marine Corps based out of Marine Corps Base Hawaii consisting of approximately 1,000 Marines and sailors. The battalion fell under the command of the 3rd Marine Regiment and the 3rd Marine Division. The battalion was deactivated in January 2022 as part of the Marine Corps' ongoing Force Design efforts.
2nd Battalion, 11th Marines (2/11) is an artillery battalion comprising four firing batteries and a Headquarters Battery. The battalion is stationed at Marine Corps Base Camp Pendleton, California. Its primary weapon system is the M777 lightweight howitzer. The battalion was the first in the Marine Corps to fully transition from the M198 Howitzer. They fall under the command of the 11th Marine Regiment and the 1st Marine Division.
3rd Assault Amphibian Battalion is one of two active duty assault amphibian battalions in the United States Marine Corps. The battalion is tasked with transporting US Marine forces and their equipment from assault ships to shore, and equipped with the Amphibious Combat Vehicle (ACV), which replaced the Amphibious Assault Vehicle (AAV). The battalion is part of the 1st Marine Division and the I Marine Expeditionary Force. The unit is based in Camp Pendleton in California.
2nd Battalion, 23rd Marines (2/23) is a reserve infantry battalion in the United States Marine Corps located throughout the Western United States consisting of approximately 1000 Marines and Sailors. They fall under the command of the 23rd Marine Regiment and the 4th Marine Division.
The 4th Assault Amphibian Battalion is a mechanized battalion of the United States Marine Corps Reserve. Their primary weapon system is the AAV-P7/A1 Amphibious Assault Vehicle and they are part of the 4th Marine Division of the Marine Forces Reserve. The unit is based out of Marine Corps Reserve Center (MARCORESCEN) Tampa, Florida, with subordinate units at MARCORESCEN Galveston, Texas; MARCORESCEN Jacksonville, Florida; and MARCORESCEN Norfolk at Joint Expeditionary Base Little Creek-Fort Story, Virginia.
Combat Logistics Regiment 3 (CLR-3) is a direct support (DS) logistics unit of the United States Marine Corps and is headquartered at Camp Foster, Okinawa, Japan. The unit falls under the 3rd Marine Logistics Group and the III Marine Expeditionary Force.
The 7th Engineer Support Battalion is an engineer support unit of the United States Marine Corps and is headquartered at Marine Corps Base Camp Pendleton, California. The unit falls under the command of 1st Marine Logistics Group and the I Marine Expeditionary Force.
1st Battalion, 12th Marines (1/12) was an artillery battalion comprising three firing batteries and a Headquarters Battery. The battalion was stationed at Marine Corps Base Hawaii and fell under the 12th Marine Regiment and the 3rd Marine Division. It was deactivated on 26 May 2023.
1st Medical Battalion is a unit of the United States Marine Corps operated by the United States Navy that provides expeditionary Health Service Support to Marine Corps forces forward deployed to operations or humanitarian missions. The unit is based out of Marine Corps Base Camp Pendleton and falls under the command of 1st Marine Logistics Group.
2nd Battalion, 9th Marines (2/9) was an infantry battalion of the United States Marine Corps. Formed during World War I, the unit played an instrumental role in the defeat of the Japanese forces in the Battles of Guam and Iwo Jima during World War II. The battalion distinguished itself in the defense of Khe Sanh during the Vietnam War, and later participated in an ill-fated invasion of Koh Tang Island in Southeast Asia, with the intention of rescuing the crew of SS Mayaguez. During Operation Desert Storm, the battalion served as the lead battalion for the III Marine Expeditionary Force.
The 3rd Tank Battalion was an armor battalion of the United States Marine Corps. It was formed during World War II and played a part in several Pacific island battles, most notably Iwo Jima, where its flame tanks played a key role in securing the island. After the war, the battalion was based at Camp Pendleton but remained inactive until the outbreak of the Korean War, eventually moving to Okinawa. Along with the 1st Tank Battalion, 3rd Tanks was involved in major combat operations in South Vietnam from 1965 to 1969. Afterwards it concentrated on desert warfare and fought in the first Gulf War in 1991. It was deactivated for the last time in 1992.
4th Landing Support Battalion(4th LSB) was a Military Landing Support battalion of the United States Marine Corps Reserve. The unit was based out of New Orleans, LA, Savannah, GA, and Charleston, SC, and fell under the command of the 4th Marine Logistics Group. The Battalion has been decommissioned.
3d Landing Support Battalion(3d LSB) is a logistics battalion in the United States Marine Corps that supports distributed maritime operations and expeditionary advanced base operations. The unit is based out of Camp Foster, Okinawa, Japan and falls under the command of the 3rd Marine Logistics Group and the III Marine Expeditionary Force.
