Sinking of the Linda Blanche out of Liverpool, Willy Stöwer's 1915 depiction of SM U-21's attack on the steamer Linda Blanche. This U-boat was built for the Imperial German Navy shortly before World War I and served in the English Channel, Irish Sea, and Mediterranean Sea. It survived the war and sank while under tow by a British warship in 1919. Over its career, SM U-21 sank 42 ships, and in 1914 it became the first submarine to sink a ship with a self-propelled torpedo.Painting: Willy Stöwer