The U-boat offensive 1914-1945

This book, illustrated with more than 150 photographs, diagrams and charts, sets out to tell the twin stories of the Battles of the Atlantic, providing the reader with the opportunity to compare the course of the two campains.
In the second world war the Allies took time to learn the lesson of the first world war, most important of which was that escorted convoys provided the only real security for merchantmen.