Based on Nazi Germany vs Soviet Union with differing levels of western support.
OTL base line. Lend lease, Bomber offensive, fighting in the med, threat and eventual western allied invasion of Europe.
Assuming Wnny never become PM and the UK drops out of the war around the end of July 1941.
Case 1. No Bomber offensive affecting German production, no Africa Corp, no invasion threat - 30% of occupation forces (including all armour and 60% of aircraft) available for the Eastern Front - No British supplies, American Lend Lease delivered to Far East - Japan stays at peace with Russia. Germany does not declare war on America - no u-boat campaign
Case 2. as Case 1 but no Lend Lease as America is isolationist and then goes all out against Japan.
Case 3. as Case 2 but Vichy and Spain act as agents to allow the Germans to purchase limited amounts of fuel and raw materials etc (Germany would not have a lot of exchange to use for purchase so this would be limited to 5% of the OTL supply to Russia)
Case 4. As Case 3 but Germany gets 20% of the Lend lease that went to the Soviet Union in OTL in exchange for all British POW's etc that they held.
OTL base line. Lend lease, Bomber offensive, fighting in the med, threat and eventual western allied invasion of Europe.
Assuming Wnny never become PM and the UK drops out of the war around the end of July 1941.
Case 1. No Bomber offensive affecting German production, no Africa Corp, no invasion threat - 30% of occupation forces (including all armour and 60% of aircraft) available for the Eastern Front - No British supplies, American Lend Lease delivered to Far East - Japan stays at peace with Russia. Germany does not declare war on America - no u-boat campaign
Case 2. as Case 1 but no Lend Lease as America is isolationist and then goes all out against Japan.
Case 3. as Case 2 but Vichy and Spain act as agents to allow the Germans to purchase limited amounts of fuel and raw materials etc (Germany would not have a lot of exchange to use for purchase so this would be limited to 5% of the OTL supply to Russia)
Case 4. As Case 3 but Germany gets 20% of the Lend lease that went to the Soviet Union in OTL in exchange for all British POW's etc that they held.