Hitler's U-Boat War: The Hunters, 1939-1942

For a period of nearly six years, the German U-boat force attempted to blockade and isolate the British Isles in hopes of forcing the British out of the war, thereby thwarting both the Allied strategic air assault on German cities and Operation Overlord, the Allied invasion of Occupied France. Fortunately for the Allies, the U-boat force failed to achieve either of these objectives, but in the attempt they sank 2,800 Allied merchant ships, while the Allies sank nearly 800 U-boats. On both sides, tens of thousands of sailors perished.

For decades, an authoritative and definitive history of the Battle of the Atlantic could not be attempted, since London and Washington agreed to withhold all official code-breaking and U-boat records in order to safeguard the secrets of code breaking in the postwar years. The accounts that did appear were incomplete and full of false conclusions and errors of fact, often leaving the entirely wrong impression that the German U-boats came within a whisker of defeating the Allies, a myth that is finally laid to rest in this account.