This book explores the long struggle at sea spanning the years of World War II, focusing on the three theaters of the Atlantic, the Mediterranean, and the Indian Ocean. While the encounters, attacks, and campaigns at sea may not be as well-known as the land battles, they were critical to the outcome of the war. Readers interested in military and naval history will be fascinated by the struggles of the Allies to maintain control of the sea lanesvital war supply linesin the face of threats from German U-boats and Axis surface ships.