UNSC Army

The UNSC Army is the branch of the United Nations Space Command responsible for terrestial ground operations under the direction of Unified Ground Command alongside UNSC Marine Corps and other land-based forces. Unlike the UNSC Marine Corps which typically carries out expedtionary operations with the UNSC Navy, Army primarily carries out ground operations and garrison duties, forming a major part of the UNSC Defence Force, alongside the UNSC Air Force.

The official mission of the UNSC Army is to provide ground defense for UNSC worlds that fall under the jurdistiction of the UEG, as well as provide logistical support for active and reserve soldiers who fight in ground campaigns. In addition to this, they responsible for training, organizing and equipping terrestial forces to defend UEG territory before and after they make landfall on UEG worlds. The Army's functions include:

Conducting civil works that have strategic application, including projects for improvement of navigation and follow-up on terraforming operations. Organization and training of civil defense units, or militias. Development and maintenance of doctrine, procedures, and equipment of common interest to itself, the UNSC Air Force and the UNSC Marine Corps. Providing forces for joint aerospace and space operations, in accordance with UNSC doctrines.

The UNSC Army is tasked to defend UEG colony worlds from hostile incursion, foreign and domestic, and the long-term occupation of neutral or enemy territory. As a result, the UNSC Army is tasked to organize, train and maintain amphibious, land and airborne forces capable of carrying out this operations viligantly. Their ability to organize and respond to hostile incursion is essential for the stability and defence of any world in the UEG, as they defend both military and civilian installations and maintain critical ground-based communications infrastructure essential to maintain contact with the rest of human controlled space. The UNSC Army maintains multiple infantry, airborne and armoured divisions. Additionally, the UNSC Army has units that fall under UNICOM's Special Warfare Command (SPECWARCOM), and has two known special operations units, the Army Rangers and Airborne Pathfinders. Additionally, SPARTAN task forces have been known to serve under the operational authority of the UNSC Army, with NOBLE Team being the most notable unit to do so.

The UNSC Army also provides several peacetime roles, such as engineers, technicians, builders and designers on civil and public works projects, and providing support for other UNSC deployments.