SM UB-123
SM UB-123 was a German Type UB III submarine or U-boat in the German Imperial Navy (Kaiserliche Marine) during World War I. Commissioned on May 26, 1918, it was one of the later boats of its type to enter service.
UB-123 saw limited action towards the end of the war. UB III class submarines were designed as mine layers and long-range attack submarines. They were larger and had greater range and torpedo capacity compared to earlier UB class submarines.
UB-123's ultimate fate is recorded as surrendered on November 21, 1918, at Harwich, England, following the Armistice. It was later broken up.