June 1915. She was commissioned on 17 August 1915 under the command of Kapitänleutnant Ludwig Güntzel. Six days into her first war patrol, U-68 encountered the British Q-ship (Q-ship number five) off Dingle and was sunk with all hands. U-68 sank no ships during her brief service career. SM U-69 U-69 was laid down on 7 February 1914 (yard number 206) by Germaniawerft at Kiel and launched on 24 June 1915. She was commissioned on 4 September 1915 under the command of Kapitänleutnant Ernst Wilhelms. During her service career, U-69 sank 31 ships with a combined gross register tonnage of 102,875, the largest among them, the 13,441 GRT armed merchant cruiser . U-69 was last heard from on 11 July 1917 when she reported being off the coast of Norway. Her fate is officially unknown, even though British reports credit her sinking to destroyer . The dates in German records, however, do not support this claim. SM U-70 U-70 was laid down on 11 February 1914 (yard number 207) by Germaniawerft at Kiel and launched on 20 July 1915. She was commissioned on 22 September 1915 under the command of Kapitänleutnant Otto Wünsche. During the war, Wünsche and U-70 sank one warship, the British sloop , and 53 civilian ships totaling . Among the civilian ships was , at , one of the largest ships hit by U-boats during the war. U-70 also damaged five ships of . U-70 was surrendered to the British on 20 November 1918 and was broken up at Bo'ness in 1919–20. Notes References Bibliography Submarine classes World War I submarines of Germany