SM UB-68 was a German Type UB III submarine or U-boat in the German Imperial Navy () during World War I. The U-boat was ordered on 20 May 1916. It was commissioned into the German Imperial Navy on 5 October 1917 as SM UB-68. The submarine conducted five patrols and sank five ships during the war. Under the command of Karl Dönitz, on 4 October 1918 UB-68 encountered technical problems and had to surface where she was sunk by gunfire at . There was one dead and thirty-three survivors. Other sources name the British warships involved in the sinking of UB-68 as and , and claim four crew members died in the event.Gröner, p.54
Summary of raiding history DateNameNationalityTonnageTonnages are in gross register tonsFate10 April 1918Warwickshire8,012Damaged11 April 1918Kingstonian6,564Damaged13 April 1918Provence III3,941Damaged26 April 1918Angelina Di Paola228Sunk1 June 1918Angelina1,260Sunk3 June 1918Glaucus5,295Sunk12 June 1918Monginevro5,271Damaged24 June 1918Saint Antoine43Sunk4 October 1918Oopack3,883Sunk
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