Western Alliance

The Western Alliance formed before the war. What was then the United States, Canada, the US protectorate of Mexico banded together to protect their space colonies, and their access to natural resources on Old Earth.

Their seat of power has long since moved away from the wasted husk of Old Earth, and their interstellar holdings can mostly sustain themselves, but the Western Alliance still has to answer to the UCS. There is simply no way to compete with a commonwealth with the economic, manufacturing, and military strength so utterly massive as that of the UCS.