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The Flanders U-boat flotillas were Imperial German Navy formations set up to prosecute the U-boat campaign against Allied shipping in the British Home Waters during the First World War. Originally operating as a flotilla, it was split in two during the latter part of the war. The Flanders flotilla was constituted in March 1915 at the port of Bruges in occupied Belgium. Commanded by ''Kapitänleutnant'' Bartenbach, the force comprised nine UB- and seven UC- type U-boats, small mass-produced coastal types suited for operations in the closed waters of the Channel and the North Sea.〔Tarrant p23〕 UB boats were prefabricated in Germany and brought in sections to Bruges and assembled. The boats used Zeebrugge and Ostend as exit ports; UC minelayers joined in late 1915.〔Terraine, J. Business in Great Waters (1999) pp. 17-20.〕 Throughout the campaign the Flotilla grew, though losses also remained high, as the unit bore a considerable proportion of the trade war (''Handelskrieg'') around Britain's coast. During 1916 12 boats were lost;〔Tarrant p34〕 in 1917 this rose to 29 boats, 9 UB- and 20 UC-type.〔Tarrant p56〕 In October 1917 the force was split into two full flotillas and Bartenbach, now a ''Korvettenkapitan'', was made flotilla leader (''Führer der U-boote'', ''FdU'').〔Tarrant p56〕 The 1st Flanders Flotilla, under K/L Walther, comprised 8 UB- and 12 UC- boats at its formation. during the next twelve months 10 UB- and 5 UC- boats were lost. With replacements the unit strength in 1918 was 16 UB- and 9 UC- boats.〔Tarrant p74〕 The 2nd Flanders Flotilla, led by K/L Rohrbeck, comprised 12 UB- and 12 UC- boats; 12 Ub- and 4 UC- boats were lost but with replacements its strength in 1918 was 17 UB- and 7 UC- boats.〔Tarrant p74〕 By the end of 1918, Germany had lost the war, and the base at Bruges was abandoned in the face of the German armies' retreat. The surviving boats of the two flotillas were surrendered at Harwich in November 1918. ==Notes== 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Flanders U-boat flotillas」の詳細全文を読む スポンサード リンク
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