SM U-13
Introduction '''SM ''U-13''''' was one of the 329 submarines serving in the Imperial German Navy in World War I. ''U-13'' was engaged in the naval warfare and took part in the First Battle of the Atlantic.She had left Heligoland on 6 August 1914 and was not heard from again. She may have been a victim of the German defensive minefield in Heligoland Bight, or from an accident or mechanical failure.
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