I think this is one of those what-ifs that I can say Germany would probably have won. Earlier jets, earlier heavy tanks, maybe a shift to total war much sooner than history records. Germany likely would have mastered control of the skies and a successful sealion very well might have ensued (although that might be pushing it). More military production and greater technology would mean a much greater chance of success on the eastern front. And if USSR is defeated, Germany wins WW2.

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