The United States Marine Corps (USMC) is a branch of the United States Armed Forces responsible for providing power projection from the sea, using the mobility of the United States Navy to rapidly deliver combined-arms task forces. It is one of seven uniformed services of the United States. Created in 1775, the Marine Corps has been a component of the United States Department of the Navy since 1834, working closely with naval forces for training, transportation, and logistics.

In Call of Duty 4: Modern Warfare

Faction USMC Silver

During the invasion of an unnamed Middle Eastern nation in 2011, Marine Forces of the USMC 1st Force Reconnaissance are portrayed, dressed in their trademark Desert MARPAT camouflaged Marine Corps Combat Utility Uniforms (MCCUUs). The player takes the role of Paul Jackson, a Sergeant in 1st Force Recon and part of a Marine Task-Force assigned to capture Khaled Al-Asad, who took over the nation in a violent coup. During the USMC's aerial calvary assault, their troops are using UH-60 Blackhawks. In the third day of the Invasion, Al-Asad detonated a Nuclear Device in his Capital City. This caused massive Marine casualties of 30,000 men, including Sgt. Paul Jackson.

Later, the United States Marine Corps and the Special Air Service were involved in a joint operation to retake a Launch Control facility from Russian Ultranationalists and prevented ICBMs from striking the United States' Eastern Seaboard. Their escape was compromised, and in the ensuing chaos it is unknown if any of the SAS soldiers or Marines involved in the raid survived except for Sgt. Soap MacTavish and Captain Price. These Marines were outfitted as commandos with black battle dress uniforms (BDUs) and balaclavas, and are likely members of the Marine Special Operations Regiment (MSOR).

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