Hitler's U-Boat Lair: The Secret Nazi Underwater Superstructures | Timeline

Secrets of Nazi U-Boat Bases offers a new look at the Battle of the Atlantic; the most important military campaign of World War II. While occupying France, Hitler built along the French Atlantic Coast what he thought was the secret to securing victory—five huge underwater bases that protected and rearmed his returning U-Boat fleet after attacking British supply ships.

Now, equipped with previously unknown German national archive documents, historians Luc and Marc Braueur reveal the secrets of these super-structures for the very first time in 75 years. Meanwhile, they uncover how the Allies utilized spying and decryption to organize radically different anti-submarine counter-measures which would defeat Hitler's navy and eventually win the war.

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