SM_U-139
SM U-139
German WWI submarine
SM U-139 was the lead ship of her class, one of the submarines serving in the Imperial German Navy in World War I. She was commissioned on 18 May 1918 under the command of Lothar von Arnauld de la Perière, who named the submarine Kapitänleutnant Schwieger, after Walther Schwieger, who had sunk the Lusitania in 1915. She only sailed on one war patrol, during which she sunk four ships. U-139 surrendered to France on 24 November 1918 and shortly afterwards became French submarine Halbronn (until 24 July 1935 when she was broken up).