USX Remnant Forces
From their website:
The remains of the once great human nations have been driven out of their places of power by the A.I.’s drone forces and traitorous human allies. Consolidating to exert power over what little remains they claim to be saviors and protectors of what once was. While no longer possessing the strength they once had they are still a formidable force. Weapons and equipment may be in short supply but Remnant forces are well fitted with high tech items and greedily hoard away any they find.