USCM

United States Colonial Marines
The USCM (United States Colonial Marine Corps) are the elite fighting force for the United Americas, and the direct successor to the United States Marine Corps. Their mandate is to project force across all colonies and territories of the United Americas. They follow traditional military protocols with a top-down command structure and a centralized leadership. They are the only means that the United Americas have for assaults on hostile forces in space.

The USCM traditionally took on anti-piracy roles in colonial space as well as escort missions for Weyland-Yutani research operations. Well armed and armored, they rarely encountered threats that they couldn't deal with despite their small unit size. In recent history the only significant defeat on record was on the Rimworld LV-426 - A simple "bug hunt" mission gone wrong. The Colonial Marines encountered the Xenomorph species and, despite staggering firepower and excellent training, were overwhelmed and slaughtered. The mission ended in disaster when the terraforming device went supercritical and exploded. There was only four survivors, and of those four only two were with the marines: A soldier named Corporal Hicks and a synthetic named Bishop. Bishop later perished due to the damage he sustained on LV-426. This event marked a turning point for the USCM as the new Xenomorph threat was above and beyond anything humanity had ever faced before.

Trvia

 * Tactically they are made up of small squads of no more than 25 men. These squads typically include: One M577-APC (Armored Personnel Carrier) and driver, one UD-4 Cheyenne Dropship with pilot and co-pilot, one commanding officer, one or two synthetics as scientific or technical support, with the remainder being infantry. Their armaments include the M41A Pulse Rifle, the M240 Incinerator, the M56 Smart Gun, and UA 571-C Automated Sentry Guns.