Here is a very interesting (I think) idea for an alternate World War Two.
Your challenge is to think about causes and reasons to make the below possible, and to think about what would happen next. Here you go:
- Later or earlier start of the war.
- No Operation Barbarossa and Russia and Germany remaining alligned.
- No US intervention (no Pearl Harbor; the Japanese don't touch American territory).
- Alternate location of D-Day: coast of Denmark and the Schelde river, simultaneously.
- Japan attacking Australia.
- Britain being able to succeed at D-Day.
- Different end of the war: Germany retaining more territory, less of a complete Allied victory, though not an Axis victory either.
- The end of the war resulting in a hot war with Russia (this one is least necessary).