Description:During the course of World War II, German U-boats threatened Britains very survival. Noted U-boat historian Jak Mallman-Showell takes a fresh look at the strategy employed by both sides as Germany and Great Britain engaged in a fateful game of measure and countermeasure to gain control of the Atlantic supply lines. Drawing upon original records from the U-boat headquarters, the Royal Navy, and British special intelligence, the author explores how and why U-boat attacks were planned, describes U-boat organization, and tells what actually happened on the high seas.