So here is the second part of my question: The USA does not get involved in the Europeans war. Operation Barbarosa if such a failure that the Soviets not only take down hitler and Mussolini, but the take all of Europe. But that was not enough, they wanted more. They want the most productive nation on earth: the USA. The take Iceland and Greenland, building huge garrisons there in preperation for a full out invasion.
In the Pacific, after operaton barbarosa is defeated, the Soviets defeat Japan, and take the IJA holdons in the Pacific: the USA and Canada is hemmed in. They Launch a two pronged assault.....