SM U-93 was one of the 329 submarines serving in the Imperial German Navy in World War I. U-93 was engaged in the naval warfare and took part in the First Battle of the Atlantic. Since Feb. 1917 she was commanded by the late author of books (e.g. U boat 202. The war diary of a german submarine, 1919) and experienced submarine commander Edgar von Spiegel von und zu Peckelsheim U 93 after repairs operated in the English channel. She was lost after 15 January 1918 of unknown reasons.