Wrong. Play Fallout 1 and Fallout 2, and then maybe we'll consider that notion.
Having played FO1/2, I can quite easily say that you're wrong. Puny earthling government who aren't powerful even by today's standards, or inter-universal conquerors with vast armies of god only knows what at their command. Only reason they're even remotely beatable on Earth is that the Xen Borderworld is their main access to our universe, and Humanity has enough knowledge of that little universe to use it to disrupt their travel. (Play Half Life 1, Opposing Force and Blueshift, then play HL2EP2, the super portal is deactivated by the same principle as the rocket in HL1, and the xen anchor beacon in Blueshift)
The Universal Union are several hundred steps above the Enclave in everyway possible.
*ahem* Great Armour Tyokio, I especially love the Deep Eyes armour as well, recently re-watched that film with my Girlfriend.
If you're ever taking requests, maybe you'd consider doing Civil Protection body armour? Maybe followed by Overwatch Soldier/Elite armour. (Difference between CP and Soldiers, is that CP are unaltered humans who willingly serve the combine, the Soldiers are transhuman [Cyborgs, essentially] and lack free will)