Solar Federation

The Solar Federation is the overarching political entity of the Sol System; and comprises well over one hundred sovereign states, as well millions of registered non-state individuals and Non-Government Organizations.

Formation
The Solar Federation was formed in the year 2111 by mutual agreement by the Republic of Luna, Martian Free Peoples, and the many reforming nations of Earth.

Since its formation, the Federation has gone on to include members from outside of Sol itself, such as the Alpha Centauri system, and the human nations located in Eta Cassiopeiae and Tau Ceti. Most of the space within 50 lightyears of Sol is generally considered part of the Federation, even if it hasn't been officially incorporated yet.