World War II Wreckages Across the Globe | Drain the Oceans MEGA Episode | National Geographic

The Battle of Britain In summer 1940, Great Britain stood alone against the Nazis. Now we uncover the wrecks that reveal the truth behind the Battle of Britain. Japan's Surprise Attack In 1942, Japan came to dominate the Pacific region. The secret as to how they did it lies waiting to be discovered. The Killer U-Boats Draining the oceans reveals the story of the U-Boats as they took on the Royal Navy, sinking 12 million tons of ships and nearly winning the war.

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