Unterseeboot 31

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Unterseeboot 31 or U-31 has been the name of several German submarines or U-boats during the First World War, the Second World War and in the reunified navy, Deutsche Marine.

  • Unterseeboot 31 (1914) was a submarine built in 1914 for service in the First World War, and lost in 1915.
    • During the First World War, Germany also possessed the submarines:
      • Unterseeboot B-31, built in 1916 and sunk in 1918.
      • Unterseeboot C-31, built in 1916 and surrendered in 1918.