Very well done.....But.

Threads like this always assumes America as a finite vacuum. That is to say, there are plenty of countries that would jump at the chance to occupy America, UNLESS you’re talking a global event here. If not and it’s locality is just America, China, Russia, Canada, Mexico, to name a few, would rush in to capture all that they could as fast as they could. Question is, would they allow survivors to live? Would we be carted off to concentration camps “for processing.”

The biggest reason people would die in a SHTF scenario is Foreign Invaders, in my opinion.