The Solarian Army is the primary ground combat force of the Solarian Empire, with a presence in almost every Imperial system, as well as on a few Verge worlds that have leased out real estate for bases.The Solarian Army is organized into three different categories:

Garrison: Garrison units are large in size and stationed on various planets, as part of a larger unit that defends an entire system or region. These are the most common types of unit and operate every level of power armor. Range from a single Company to an entire Division, based on the needs and mission.

Assault: Assault units range from Company to Brigade size and are stationed at strategic points throughout Imperial space and on certain Verge worlds. Their purpose is offensive operations and operate Level 2+ armor. All Special Forces soldiers fall into this category. The size of the unit dictates the kind of mission and the section of the Corps it operates with.

Guard: The Imperial Guard are special soldiers assigned to protecting the upper levels of the Solarian government, to include the Emperor himself. All Imperial Guardsmen operate Level 4 Armor when needed, though wear a variant on the dress uniform when on duty. The Guard coordinates with the Navy and Marines when the members they're assigned to have to travel travel. The Minister of Foreign Affairs receives additional Marine protection when traveling, due to the nature of the position.