WI: Dysfunctional Axis?

Part 2 of my 1941 POD idea:

December 8, 1941: Imperial Japan receives a message from the German Embassy in Tokyo: "You have refused to help us in our war against the Soviet Union. You shall fight the United States alone."

With the American-Japanese war in full gear, minimal American presence in the Atlantic (aside from lend-lease), how quickly would Japan fall? How much more bloody, and dragged out, does the war in Europe go? I still see UK winning in north Africa, but incapable of invading Italy or liberating France on their own. Eventually, a stalemate, with the USSR winning at Stalingrad but unable to retake Kiev or Minsk.
 
The Germans will still declare war on the USA, their idea was it was simply rendering an undeclared war an official war. The course of OTL events changes only in that there is not even the pretense of Axis co-operation and two completely separate wars on the part of Germany and Japan, leading to a US-Soviet partition of Germany and Europe and a cold war just like IOTL.
 
Top