Under his command the U-boat fleet fought an unrestricted submarine warfare during the Battle of the Atlantic.

Plan Z was a combination of a strong battle fleet capable of challenging the British and a big U-boat fleet for commerce raiding.

Building a hundred high-tech diesel subs on spec, supposedly for export, then suddenly turning that inventory into a modern U-boat fleet.

The Germans lost 783 U-boats and approximately 30,000 sailors killed, three-fourths of Germany's 40,000-man U-boat fleet.

The Allies in World War II could have won the battle against the German U-boat fleet "without the assistance of the code breakers," he maintains.

The T2 model of the G7e was in service with German U-boat fleets from the first day of World War II.

During World War II the château was requisitioned by the German U-boat fleet.

During 1943 and 1944, due to Allied anti-submarine tactics and better equipment the U-boat fleet started to suffer heavy losses.

Yes, the Allies did defeat the German U-boat fleet in the Atlantic.

He was commander in chief of the Atlantic Fleet and is credited with organizing the defeat of the German U-boat fleet during the war.