The 4th Marine Division is a reserve division in the United States Marine Corps. It was raised in 1943 for service during World War II, and subsequently fought in the Pacific against the Japanese. Deactivated after the war, the division was re-formed in 1966 and elements of the division deployed during the Gulf War in 1990–1991, as well as during the Iraq War. It is currently the ground combat element of the Marine Forces Reserve and is headquartered in New Orleans, Louisiana and has units throughout the United States.
3rd Battalion 11th Marines (3/11) is an artillery battalion comprising three firing batteries, a Liaison Unit, and a headquarters battery. The battalion is based at the Marine Corps Air Ground Combat Center Twentynine Palms, California and its primary weapon system is the M777 lightweight howitzer with a maximum effective range of 30 km. They fall under the 11th Marine Regiment and the 1st Marine Division.
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 also located at Marine Corps Air Station Yuma and Marine Corps Air Ground Combat Center Twentynine Palms.
The 12th Marine Regiment is an artillery 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 11th Marine Regiment is an artillery regiment of the United States Marine Corps based at Marine Corps Base Camp Pendleton, California. Known as the "Cannon Cockers", the regiment falls under the command of the 1st Marine Division and the I Marine Expeditionary Force. Its primary weapon system is the M777A2 howitzer with a maximum effective range of 30 km, however the 5th Battalion has converted to fire the HIMARS weapon system.
1st Battalion 11th Marines (1/11) is an artillery battalion comprising four firing batteries and a Headquarters battery. The battalion is stationed at the Marine Corps Base Camp Pendleton in California. Its primary weapon system is the M777 lightweight howitzer. The battalion is under the command of the 11th Marine Regiment, part of the 1st Marine Division.
2d Battalion 11th Marines ("Patriot") is an artillery battalion comprising three firing batteries and a Headquarters Battery. The battalion is stationed at Marine Corps Base Camp Pendleton, California and 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.
5th Battalion 11th Marines (5/11) is a High Mobility Artillery Rocket System (HIMARS) battalion consisting of four Firing Batteries and a Headquarters Battery. The battalion is stationed at Marine Corps Base Camp Pendleton, California. It is the first active duty HIMARS Unit in the Marine Corps. They fall under the command of the 11th Marine Regiment and the 1st Marine Division. This is the only battalion in the 11th Marine Regiment not using the M777A2 lightweight howitzer.
1st Battalion, 10th Marines (1/10) is an artillery battalion composed of four firing batteries and a headquarters battery. The battalion is stationed at Camp Lejeune, North Carolina and falls under the command of 10th Marine Regiment, part of 2d Marine Division. Its primary weapon system is the M777A2 155mm lightweight howitzer.
2nd Battalion, 14th Marines (2/14) is a reserve artillery battalion comprising three firing batteries and a headquarters battery. The battalion headquarters is in Grand Prairie, Texas. In 2006 the battalion became the first fully operational HIMARS battalion in the Marine Corps. Fox Battery, based in Oklahoma City, Oklahoma. was deployed in July 2007 in support of Operation Iraqi Freedom, and has the distinction of being the first Marine Corps HIMARS battery to deploy into combat.
5th Battalion 14th Marines (5/14) is a reserve artillery battalion of the United States Marine Corps commanded by Lieutenant Colonel Nathan Rylander, comprising four firing batteries and a headquarters battery. The battalion is based in Seal Beach, California and its primary weapon system is the M777A2 howitzer with a maximum effective range of 40K. They fall under the command of the 14th Marine Regiment and the 4th Marine Division.
The 4th Combat Engineer Battalion is a combat engineer battalion of the United States Marine Corps Reserve. The headquarters is in Baltimore, Maryland and the Battalion has units in West Virginia, Alabama, Virginia, and Tennessee. They belong to the 4th Marine Division of the Marine Forces Reserve.
The 9th Marine Regiment was an infantry regiment of the United States Marine Corps. Formed during World War II, it served until 1994, when it was deactivated during the post Cold War drawdown. Battalions of the Ninth Marine Regiment, but not the regiment itself, were reactivated from 2007 to 2014 as part of the Marine Corps' growth during the wars in Iraq and Afghanistan. The battalions have subsequently been deactivated again.
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.
3rd Battalion 12th Marines (3/12) is an artillery battalion comprising four firing batteries and a Headquarters Battery. The firing batteries are not permanently assigned to the battalion- they are all on 6 month rotations in Okinawa from the 10th Marine Regiment and the 11th Marine Regiment. The battalion is stationed at Camp Hansen, Okinawa, Japan and its primary weapon system is the M777 lightweight howitzer with a maximum effective range of 30 km. Along with the M142 High Mobility Artillery Rocket System (HIMARS) The battalion utilizes the Unit Deployment Program to fill its four firing batteries with detachments from artillery units across the Marine Corps.
1st Battalion 12th Marines (1/12) is an artillery battalion comprising three firing batteries and a Headquarters Battery. The battalion is stationed at Marine Corps Base Hawaii and falls under the 12th Marine Regiment and the 3rd Marine Division. The battalion has recently transitioned to its new primary weapon system the M777 lightweight howitzer with a maximum effective range of 30 kilometres (19 mi).
The 212th Fires Brigade is an artillery brigade in the United States Army. It was based at Fort Bliss, Texas and was a subordinate unit of III Corps.
The 75th Field Artillery Brigade is an artillery brigade in the United States Army. It is currently based in Fort Sill, Oklahoma and supports the III Corps. The brigade is officially tasked to train and prepares for combat; on orders deploys to any area of operations to plan, synchronize and execute combined, and joint fires and effects. Integrate attached ground and air maneuver forces and on order function as a maneuver headquarters in support of full spectrum operations.
The 1st Maintenance Battalion is a battalion of the United States Marine Corps that provides intermediate-level maintenance for the I Marine Expeditionary Force's tactical ordnance, engineer, motor transport, communications electronics and general support ground equipment. The Marines and Sailors of 1st Maintenance Battalion are regularly assigned and deployed around the world with command elements that deliver tactical logistics support to I MEF units. The command is based out of Camp Las Pulgas, Marine Corps Base Camp Pendleton, California and is organized under the command of the 1st Marine Logistics Group.
9th Communication Battalion is a communications battalion in the United States Marine Corps. It is part of the I Marine Expeditionary Force and is headquartered at Marine Corps Base Camp Pendleton, California.
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United States Marine Corps 
