I was thinking of creating an alternative timeline for roleplaying and writing purposes. The premise would be that the Third Reich won the war, then went on to survive 1000 years as envisioned by its leaders. It would then be a mix of future history, science-fiction and alternative history.
The turning point I was thinking about would be that the nazis won Barbarossa, maybe by concentrating forces towards Moscow instead of dividing them. The Japanese could also have won in Asia.
What do you think would have made a 1000 years Reich possible ?