Günther Prien and U-47 : the bull of Scapa Flow : from the sinking of the HMS Royal Oak to the Battle of the Atlantic /

On the night of 13/14 October 1939, the Type VIIB U-boat U-47, on its second war patrol, penetrated the main Royal Navy base at Scapa Flow and sank the British battleship HMS Royal Oak. This legendary attack is remembered as one of the most audacious raids in the history of submarine warfare. Over t...

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