The United American Systems, or the UAS in shorthand, is a major human interstellar power of the Sundala Starzone and one of the key members of the Solar Confederation. Founded by three colony cylinder arks; the Horizon Bay, the New Dominion, and the Santiago's Reach. It is the cultural and societal successor state to the United American Continental Federation, with most of the population aboard the arks being from this former Sol power bloc. It is located on the 'coreward' stretch of the starzone and effectively 'caps' the vast interstellar region.

European Cooperative Community (ECC)
New Realm Nation (SOK)
Coalition of Progressive People's Systems (KSPN)
Far East Strategic Alignment (SinoPact)

Inner Sphere
Outer Sphere
Colonial Halo