Rebellion

Overview
The Rebellion formed when the human race first achieved space travel because as soon as they got to a system it would soon be conquered by the Combine making them resist with force.

Garry's Mod Chronicles Rebellion
Before The Imperium of Man was even a thought the Rebellion had to fight the Combine.

Radio Space Rebellion
During this time period the Rebellion played a key role in assisting and sacrificing themselves for the Great Crew to help them defeat the forces of Dark and became very close with the Tau Empire.

SPUNT Rebellion
The Rebellion had switched roles from what it was in Radio Space with the combine and the New Crew, the New Crew was defending the Rebellion from being completely wiped out by the combine and The Imperium of Man as they were both trying to take influence as the two main influences of the Milky Way.