Imperium of the United Galaxy

Has Billions serving active duty

Mainly is religion focused, which I tolerate

Known to be the batshit insane people who bring a chainsaw into battle and do insane things

The United Republic of Remment

Owns a quarter of the it's home galaxy 

Found someway to make Dust work offworld (Through my reality rewriting)

Known for having one of the best freelancers in the UOR army (Hunters and Huntresses pulled into the army)

United Systems Alliance

United with the Citadel, but kept the name.

Currently is one of the great powers and is compared with the UNSC many times

Known for the Geth and the Reapers uses during the Battle of the Madoka Omniverse

Galactic Confederation

After absorbing the Mega-corporations of the Neon Divide world the Galactic Union morphed into the Galactic Confederation.

Is one of the greater powers and is compared with the HDR and the Systems Alliance

Still stabilizing after the corporations left and is currently under the management of the UOR until further notice