"You can't prevent World War III. You don't have any juice. In fact, World War III will free you. ... Your time has come."

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If the Britain and France had done what they were obliged to do under the treaty and sent troops to enforce the treaty when Hitler remilitarized the Rhineland, the German general staff would have turned Hitler out. And one would not have had a cause for war, and you wouldn't have had World War II.

— Graham T. Allison