Lothar returned to service with Jasta 11 in July 1918. He scored his final victory (a DH-9a) on 12 August 1918, flying a Fokker D.VII. The next day he was again wounded in action against Sopwith Camels, probably by Captain Field E. Kindley of the 148th Aero Squadron USAS. Lothar may also have been forced down by Canadian RAF pilot William Stephenson, later known as the World War II spymaster code-named "Intrepid". Lothar was promoted to Oberleutnant, and saw no further combat before the war ended in November.