As Johnnyreb mentioned Hitler did not remember the U-boat's role in WWI but the British would have. A submarine is an offensive weapon and Great Britain would have monitored the build up of the U-boat fleet and viewed at as a major threat since the British would know that they could be starved to death by a numerical superior U-boat fleet. No way she would have stayed out of Hitler's way.

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American by birth, TEXAN by the grace of GOD!