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I have a question, and what better place to ask then here, anyways, how possible would it be for a nuclear war to start between China and the U.S, more on that thought, is possible that a genetic mutant rule almost all of the devastated united state after a nuclear war and descendants of the U.S government survive such an attack while only protected by an oil rig, and that aliens still abduct humans who are from a radio active wasteland?

Okay, first of all, according to the timeline, the US and China started fighting in the first place because natural resources were running out. 2066 brought about an energy crisis in China that saw the largest country in the world being FAR more aggressive about trade talks with the US, who were equally as aggressive about their resource supply and outright refusal to trade with China. That's how everything started.

Secondly, the super mutants were created by one Dr. Richard Moreau, who changed his name to Richard Grey after his expulsion from Vault City (the survivors of Vault 8, one of only a few control vaults in existence) after a mishap exploring the old Mariposa Military Base involving a crane arm, resulting in him being knocked into a vat of the FEV (Forced-Evolutionary Virus, designed originally to counteract the feared biological attack from China) in which case he became Master and subsequently experimented on unwitting explorers of the old base, turning them into super mutants.

Sure, the super mutants would have probably come at some point anyways, with or without The Great War, considering the United States Government had noticed a significant change in the test subjects during the experiment, one that could be exploited for military uses, but as it stands it's all thanks to Grey that mutants are such a problem (and they're more of a headache in the original games than in Fallout 3, unless you bring the Super Mutant Overlord into consideration, those are just a b***h to fight, what with their Tri-Beam Lasers).