This scenario is something that I have thought about for a while. What would the military implications be for the following scenario.
The war in the Pacific does not occur as the Japanese do not attack China in 1937, there is no trade embargo and no need for war.
However the USA become involved in the European war sometime between Dec 1941 - Feb 1942 as the result of an incident in the Atlantic, say a major US warship being sunk with all hands by a U-Boat.
Up until September 1942 the war progresses as per OTL, then the Germans capture Stalingrad and manage to stop the USSR’s counter offensive. Due to less losses for the Germans and more the Soviets, the Kursk Offensive is successful and a major soviet army is destroyed. Either a military Coup gets rid of stalin and they sue for peace or Stalin himself asks for peace. The eastern war finishes Oct 43.
For the western allies the war up to Aug 43 goes as our OTL i.e. operation Torch takes place the Germans are thrown out of Africa and Sciliy is taken.
What happens now? What military strategy do the Western Allies follow? With no Pacific do we see a bigger American army but a smaller (though still large) naval build up? Do they invade Italy? What happens in Iran?