Flanders U-boat flotillas

U-Boat Flotilla, Flanders
Active Raised March 1915, Dissolved Oct 1918
Country Germany
Branch Imperial German Navy
Type U-boat flotilla
Garrison/HQ Bruges, Belgium
Nickname(s) Flanders flotilla

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.[1] 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.[2]

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;[3] in 1917 this rose to 29 boats, 9 UB- and 20 UC-type.[4] 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).[5]

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.[6]

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.[7]

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

  1. Tarrant p23
  2. Terraine, J. Business in Great Waters (1999) pp. 17-20.
  3. Tarrant p34
  4. Tarrant p56
  5. Tarrant p56
  6. Tarrant p74
  7. Tarrant p74

References

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