The U-Boat War – A Global History 1939-45, Lawrence Paterson.
A detailed examination of the entire U-boat war, looking at all of the theatres in which the Germans deployed their U-boats, from the Atlantic to the Far East, and just about every other ocean. Argues that the U-boat war was doomed from the start, with far too few U-boats when the British were most vulnerable, and a failure to develop and deploy new types of U-boats meaning that the Germans fell further and further behind technically
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