3 days after Germany begins the invasion of France, what if the Soviets threw everything they had into a invasion of western Poland and Germany? Is this the one and only Scenario where Germany is crushed without US help being needed? Considering over 90% of the German army was involved in the invasion of France, the Germans would have virtually no troops to stop the Red Army, no fortifications in the east to slow the red army down. (none that existed in 1940 anyway). Not to mention at this point in history, the Soviets had more submarines than the Germans had U-boats, meaning the Germans lose control over the Baltic sea.
This scenario is entirely plausible, I see no reason why Stalin wouldn't be able to break the Molotov-Ribbentrop pact, due to his total control over the communist party and soviet government, he could simply push this decision through. And seeing as how Hitler stated in Mein Kampf that he wanted to annihilate the Russians, perhaps Stalin should have invaded Germany at that time and used Things like Mein Kampf and other Nazi Rhetoric to make the Soviet Invasion a justified preemptive strike.
Its also worth noting that Germany was getting most of its oil, rubber, grain from the USSR at this time, cutting off these supplies would seriously limit German major operations, meaning they probably would not be able to rush to Paris before the Soviets get to Berlin.
This scenario is entirely plausible, I see no reason why Stalin wouldn't be able to break the Molotov-Ribbentrop pact, due to his total control over the communist party and soviet government, he could simply push this decision through. And seeing as how Hitler stated in Mein Kampf that he wanted to annihilate the Russians, perhaps Stalin should have invaded Germany at that time and used Things like Mein Kampf and other Nazi Rhetoric to make the Soviet Invasion a justified preemptive strike.
Its also worth noting that Germany was getting most of its oil, rubber, grain from the USSR at this time, cutting off these supplies would seriously limit German major operations, meaning they probably would not be able to rush to Paris before the Soviets get to Berlin.