 Complete the following phrase:  In October 1917, Germany launched Operation Albion, an invasion of islands in the West Estonian archipelago to secure the left flank of the German Army following the German capture of Riga. The Germans assembled a powerful naval force to support the operation, reinforced by forces detached from the High Seas Fleet, including the 6th Torpedo Boat Flotilla and V44. V44 returned to the North Sea in November 1917, and on 17 November 1917 took part in the 