Unterseeboot 66

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Unterseeboot 66 or U-66 has been the name of several German submarines or U-boats during the First World War and the Second World War.

  • Unterseeboot 66 (1915) was built in 1915 and operated in the First Battle of the Atlantic during the First World War before being sunk in 1917.
    • During the First World War, Germany also operated two other U-boats with similar designations:
      • Unterseeboot B-66 was built in 1917 and disappeared in 1918.
      • Unterseeboot C-66 was built in 1916 and sunk in 1917.