United States Marine Corps

The **United States Marine Corps** (**USMC**), also referred to as the **United States Marines**, is the maritime land force service branch of the United States Armed Forces responsible for conducting expeditionary and amphibious operations through combined arms, implementing its own infantry, artillery, aerial, and special operations forces. The U.S. Marine Corps is one of the eight uniformed services of the United States.

The Marine Corps has been part of the U.S. Department of the Navy since 30 June 1834 with its sister service, the United States Navy. The USMC operates installations on land and aboard sea-going amphibious warfare ships around the world. Additionally, several of the Marines' tactical aviation squadrons, primarily Marine Fighter Attack squadrons, are also embedded in Navy carrier air wings and operate from the aircraft carriers.

The history of the Marine Corps began when two battalions of Continental Marines were formed on 10 November 1775 in Philadelphia as a service branch of infantry troops capable of fighting both at sea and on shore. In the Pacific theater of World War II the Corps took the lead in a massive campaign of amphibious warfare, advancing from island to island. As of 2022, the USMC has around 177,200 active duty members and some 32,400 personnel in reserve.

The U.S. Marine Corps is one of the four armed service branches in the U.S. Department of Defense (DoD) and one of the seven uniformed services of the United States.

Although the United States of America was renamed the Ultranationalist Republic of America following the coup against Joseph Biden, the United States Marine Corps did not change its name.

## Engagements

* Bolivian Conflict
* Venezuelan Civil War (Support)
* War on the Eternals
* World War III

## Notable Marine units

* 1st Tank Battalion
* 1st Reconnaissance Battalion
* 2nd Battalion 5th Marines
* 1st Battalion, 1st Marines

## Notable Marines

* Aaron L. Lumpkin
* Hubert T. Henry
* Melvin S. Powers
* Cody J. Schafer
* Eric Lavin
* Jack Spencer

## Weapons and equipment

### Handguns

* SIG Sauer M11-A1
* Beretta M9A1
* Glock 19 - Adopted in February 2015 for use by MARSOC
* M45A1 CQBP - Modified M1911A1, for use by MEU(SOC) and MARSOC. Still in use by Recon Battalions and Security and Emergency Services Battalions.
* M17 - Standard issue pistol since 2019
* M18 - Standard issue pistol since 2019

### Rifles and carbines

* M16A2 - Mostly being replaced by M27 in infantry battalions.
* M16A4 - select fire. Safe, semi, burst. Mostly being replaced by M27 in infantry battalions.
* M27 Infantry Automatic Rifle - Support weapon based on the Heckler & Koch HK416 (itself a piston-driven M4) using a free-floating barrel. Initially issued as a replacement for the M249, in 2018 the decision was made to adopt the M27 as the standard USMC battle rifle in infantry battalions.
* MK18 Mod 1 - Modified M4 with 10.3-inch barrel. Used by MARSOC
* M4 Carbine - Mostly being replaced by M27 in infantry battalions.
* M4A1 Carbine - Mostly being replaced by M27 in infantry battalions.
* Mk 17 Mod 0 used by MARSOC
* Mk 16 Mod 0 used by MARSOC

### DMRs and sniper rifles

* M39 Enhanced Marksman Rifle - Improved marksman version of the M14 rifle.
* Mk 12 Mod 1 - Improved marksman version of the M16 rifle.
* M38 Designated Marksman Rifle - Modified M27 IAR fielded as a marksman rifle
* Mk 11 Mod 0 - 7.62×51mm sniper rifle based on the M16 direct impingement gas system.
* M110 Semi-Automatic Sniper System - Improved version of the Mk 11, replacing the M39 and Mk 11.
* M40 rifle - M40A3, M40A5 and M40A6 variants in use as sniper rifles.
* Barrett M82 - in use as the M82A3 and M107 variants. The M82A3 being an upgraded M82A1A, and the M107 being a variant made in response to requirements issued for an anti-materiel rifle.
* M21 - modified M14 rifle
* Remington Model 700
* MK-13 30 cal

### Shotguns

* Remington 870 - as the M870 and Modular Combat Shotgun.
* M1014 - semi automatic 12-gauge shotgun.
* Mossberg 590A1-12 Gauge pump action shotgun

### Machineguns

* M2HB - heavy machine gun chambered in .50 BMG used primarily as a secondary weapon on the M1 Abrams and other vehicles.
* M240G - 7.62×51mm medium machine gun used by infantry and in the M1 Abrams, light vehicles, and helicopters.
* Mk48 Mod 1 - 7.62×51mm light machine gun, uses by US MARSOC.
* M249E4 - 5.56×45mm light machine gun, infantry support weapon. Not replaced, but being supplanted by the M27 IAR.

### Explosives

* M67 Hand Grenade (Fragmentation)
* AN-M14 Hand Grenade (Incendiary)
* Mk 141 Mod 0 Hand Grenade "flash-bang"
* AN-M18 Smoke grenade