In November 1918, U-135 was ordered to help put down the German Navy mutiny at Wilhelmshaven. Along with the 4th Torpedo Boat Half-Flotilla, U-135 ended the mutiny aboard two German battleships SMS Thüringen and SMS Helgoland by threatening to torpedo the ships. The U-135 was seen by later submarine designers as an excellent design. She was an inspiration for V-boats USS Cachalot (SS-170) and USS Cuttlefish (SS-171).