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What if Eisenhower and others in charge of planning the D-Day invasion of Normandy had taken a fatal risk in the planning of the operation? Maybe they chose to go ahead on a day when the weather took a turn for the worse or the Nazis had had better intelligence. What outcome would this have on the subsequent war? It's unlikely that this would have been sufficient to allow the Nazis to outright win the war, but could it have allowed for conditional surrender on the German's part or allowed the Soviets to grab a larger chunk of Germany?
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