Good question by the OP. Way back when ('70s and '80s) I'd always thought it would have been a great idea to explore for future installments of the "original" APES movie series. I felt there were a lot more interesting story possibilities than most gave this franchise credit for. Many of them were explored in comic book form.
shareOne would think that other countries would try to retake the U.S. unless they're in the same situation. Although it could make for a comedic parody to have someone with a obvious British or Canadian accident land near him with some futuristic technology, like a flying car, and indicate the astronauts had the bad luck to land in the "ape sanctuary."
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We don't know what had started the nuclear war. Possibly another country (or organization) attempted to take advantage of the turmoil the ape revolution was causing.
shareThe war wouldn't be world wide unless the apes could send them off themselves. It makes no sense on why they blame humanity only when it would take them or many countries to wipe it all out
shareI thought 3 showed police state's on the north American continent and with bombs going off to fight apes rebelling nuked each other with disease, famine and radiation dwindling the numbers.
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