SM UB-68 was a German Type UB III submarine or U-boat in the German Imperial Navy (German: Kaiserliche Marine) during World War I. The U-boat was ordered on 20 May 1916. She 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 33.9333°N 36°W. 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.[1]
| Date | Name | Nationality | Tonnage[2] | Fate[3] | |
|---|---|---|---|---|---|
| 10 April 1918 | Warwickshire |  | 8,012 | Damaged | |
| 11 April 1918 | Kingstonian | | 6,564 | Damaged | |
| 13 April 1918 | Provence III |  | 3,941 | Damaged | |
| 26 April 1918 | Angelina Di Paola | 228 | Sunk | ||
| 1 June 1918 | Angelina | 1,260 | Sunk | ||
| 3 June 1918 | Glaucus | | 5,295 | Sunk | |
| 12 June 1918 | Monginevro | 5,271 | Damaged | ||
| 24 June 1918 | Saint Antoine | | 43 | Sunk | |
| 4 October 1918 | Oopack | | 3,883 | Sunk |