Garbage. This assumes China/Japan and Mex and Russia are stronger than a divided USA. NO. It also assumes the American citizens will roll over to the Russians, Mexicans, etc. NO. How many guns are out there in the USA? How will the people of Alaska react to being ruled by Russia? These countries do not have armies big enough to pacify any part of the USA.
My thoughts exactly.
Alaska is tiny. Barely over half a million in population and extremely spread out. It would be Russian in a month in the event of a civil war.