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 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 25 miles. 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.
2nd Battalion, 1st Marines (2/1) is an infantry battalion in the United States Marine Corps based in Camp HORNO on Marine Corps Base Camp Pendleton, California. Nicknamed "The Professionals," the battalion consists of approximately 1,200 Marines and Sailors. Normally they fall under the command of the 1st Marine Regiment and the 1st Marine Division.
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.
3rd Battalion, 6th Marines (3/6) is an infantry battalion in the United States Marine Corps based out of Camp Lejeune, North Carolina. Also known as "Teufelhunden", it consists of approximately 1000 Marines and Sailors. They fall under the 6th Marine Regiment and the 2nd 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.
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.
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.
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.
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.
5th Battalion, 11th Marines (5/11) was 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 five 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.
5th Battalion 10th Marines (5/10) was a US artillery battalion comprising three firing batteries and a headquarters battery. The battalion was stationed at Marine Corps Base Camp Lejeune, North Carolina, USA and its primary weapon system was the M777A2 howitzer, with a maximum effective range of 30 km. They fell under the command of the 10th Marine Regiment and the 2nd Marine Division. The battalion was known by its nickname of, "The Five and Dime."
3rd Battalion 10th Marines (3/10) was an artillery battalion that consisted of four cannon firing batteries and a headquarters battery. The battalion was stationed at Marine Corps Base Camp Lejeune, North Carolina and its primary weapon system was the M777-A2 howitzer with a maximum effective range of 30 km and the M-252 Expeditionary Fire Support System (EFSS). 3/10 fell under the 10th Marine Regiment and the 2nd Marine Division. The battalion was deactivated at Camp Lejeune on 26 April 2013.
1st Battalion 14th Marines (1/14) was a reserve artillery battalion comprising three firing batteries and a headquarters battery. The battalion was based in Alameda, California. Its primary weapon system was the M198 Howitzer. It was part of the 14th Marine Regiment of the 4th Marine Division.
3rd Assault Amphibian Battalion is one of two active duty assault amphibian battalions in the United States Marine Corps. The battalion's primary weapon system is the Amphibious Assault Vehicle or AAV. The AAV is a 27.5-ton armored vehicle that carries up to 21 combat-loaded Marines and is armed with the UGWS, which mounts a .50 cal (12.7 mm) M2HB machine gun and a Mk-19 40 mm grenade launcher. The battalion is also equipped with the Amphibious Combat Vehicle or ACV, a rather new variant to the USMC’s amphibious armament which will replace the AAV in years to come. The AAV and ACV are the only armored vehicles in the U.S. inventory that are fully capable of operations both on land and in the ocean. The battalion is part of the 1st Marine Division and the I Marine Expeditionary Force. The unit is based in Camp Pendleton, California.
The 1st Battalion 9th Marines (1/9) was an infantry battalion of the United States Marine Corps. Formed during World War I, it served until the mid-2000s when it was deactivated to make room for one of three light armor reconnaissance battalions. During the Vietnam War, 1/9 sustained an especially high casualty rate, such that it received the nickname "The Walking Dead".
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 systems are 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.
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United States Marine Corps 
