Your father was the warlord of the Sotir clan, once a proud and mighty group. He lead the first rebellion against the GDI.
Unfortunately he got stopped and killed by a task force which was assigned to a young GDI Commander.
His most loyal men could bring you to safety. Since that day you developed a deep and dark hate for the GDI.
As you turned 18 you became the new warlord for the remaining members of the Sotir clan. Upset with the past you have a clear goal, to finish the fight and take revenge.
Mutant raiders and smaller clans are all scattered around the yellow zones fighting each other. There has to be one who can unite them once again.