Example image of eyePlorer eyePlorer map for 'U-boat Campaign (World War I)': 1914 1918 Allies of World War I Naval warfare U-boat World War I British Isles Mediterranean Sea Blockade German Empire United Kingdom of Great Britain and Ireland British Empire Commerce raiding German Bight Kaiserliche Marine Royal Navy Unrestricted submarine warfare Blockade of Germany Treaty of Versailles Heligoland North Sea Austro-Hungarian Navy Strait of Otranto French armoured cruiser Léon Gambetta French battleship Jean Bart (1911) SM U-12 (Austria-Hungary) SM U-5 (Austria-Hungary) Torpedo Grand Fleet High Seas Fleet Zigzag Theobald von Bethmann-Hollweg Hugo von Pohl Ostend Gross Register Tonnage SM UB-4 SM U-28 (Germany) Old Head of Kinsale RMS Lusitania SM U-20 Woodrow Wilson Robert Lansing Great Yarmouth SM UC-2 SM UC-5 Folkestone SM UC-1 SM UC-3 SM UC-6 SM UC-7
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