Sometimes, people get caught on the wrong side of the border when war breaks out. If State is there and can help, great, but if not, you are on your own.
"You need to make your own plans, make your own contacts and be aware of what is happening.... If State is there and can help, great, but if not, you are on your own."
Good advice, and unfortunately not understood by many Americans who are new to traveling abroad.
State has very, very limited abilities to do anything outside the bureaucratic mission, and playing Big Daddy is not within their area of responsibility.
I have seen them go above and beyond the call (guaranteeing the hospital bills for an acquaintance who'd gotten food poisoning and gone comatose from dehydration), but it's unusual.
Outside of Western civilization, you pretty much have to live on your own wits.