Kapitänleutnant Wilhelm Otto Walther Schwieger (7 April 1885 â 5 September 1917) was a German military officer. He was a U-boat commander in the Imperial German Navy (Kaiserliche Marine) during First World War. In 1915, he sank the passenger liner with the loss of 1,198 lives.
Born at Berlin in 1885, Schwieger joined the Imperial German Navy in 1903. From 1911 he served with the U-boat Service and in 1912 took over command of . After the outbreak of World War I in 1914 he was promoted to Kapitänleutnant and in December 1914 was given command of . As a submarine captain, Schwieger has been noted for his cavalier approach to attacking without being sure about the identity or nationality of his target, sometimes in breach of orders to the contrary. His policy has been described as "shoot first and ask questions later".
On 1 February 1915, he attacked the hospital ship , but the attack failed.
On 7 May 1915, Schwieger was responsible for U-20 sinking passenger liner leading to the deaths of 1,198 people, an event that played a role in the United States' later entry into World War I. He also torpedoed on 4 September 1915 and on 8 May 1916. On 31 May 1917, his U-boat sank the during that ship's voyage from Yokohama to London, causing the loss of eight lives.
Schwieger was killed in action on 5 September 1917. His U-boat most likely struck a mine. It sank north of Terschelling at with the loss of all 43 hands.
During his wartime career, Schwieger captained three different submarines, on a total of 34 missions. He sank 49 ships, measuring .
Schwieger is portrayed in the docudrama ' in 2007, where he is played by actor Florian Panzner.