I saw a video in which some characters of the Fallout tv show open a fridge and find an alien and just toss it out because they want the working fridge. I’ve never understood (or really bothered with) why Fallout had the nuclear “event” which triggered the use of the shelters. Was it an alien invasion?
Convenientional war started before. Some time during the war Americans started mass producing power armors and that gave a massive advantage. With that advantage, they started invading China.
That was end of war records in Fallout 2. The implications are obvious I believe.