"In Defeating the U-boat: Inventing Antisubmarine Warfare, Newport Paper 36, Jan. S. Breemer tells the story of the British response to the German submarine threat. His account of Germany's 'asymmetric' challenge (to use the contemporary term) to Britain's naval mastery holds important lessons for the United States today, the U.S. Navy in particular. The Royal Navy's obstinate refusal to consider seriously the option of convoying merchant vessels,...