Henning von Holtzendorff

Henning von Holtzendorff
Admiral von Holtzendorff in 1918
Birth name	Henning Rudolf Adolf Karl von Holtzendorff
Born	9 January 1853 (1853-01-09) Berlin, Prussia
Died	7 June 1919 (1919-06-08) (aged 66) Uckermark district, Weimar Republic
Allegiance	Prussia  North German Confederation  German Empire
Service/branch	North German Federal Navy  Kaiserliche Marine
Years of service	1869–1913 1915–1918
Rank	Großadmiral
Unit	West Africa Squadron East Asia Squadron Baltic Sea Naval Station
Commands held	Imperial Shipyard Danzig I Battle Squadron High Seas Fleet Imperial Admiralty Staff
Battles/wars	Franco-Prussian War Boxer Rebellion World War I
Awards	Order of the Black Eagle Pour le Mérite with oak leaves
Other work	Member of the House of Lords

Henning von Holtzendorff (January 9, 1853 – June 7, 1919) was a German admiral during World War I, who became famous for his December 1916 memo about unrestricted submarine warfare against the United Kingdom. He was a recipient of Order of the Black Eagle and the Pour le Mérite with oak leaves and was one of just six Grand Admirals of the Imperial German Navy.

Holtzendorff was born into a noble family in Berlin on January 9, 1853. He joined the navy in 1869, served in the Franco-Prussian War and afterwards as a staff officer in the West Africa Squadron. Promoted to captain in 1897; he was present during the Boxer Rebellion as commander of a cruiser in the East Asia Squadron. He served as chief of staff at the Baltic Sea Naval Station and was director of the Imperial Shipyard at Danzig, before becoming a Vice Admiral in 1904. Two years later he was appointed commander of the I Battle Squadron. By 1909 he commanded the High Seas Fleet, becoming a full Admiral in the next year. In 1913 he was forced into retirement due to his opposition of rapid German naval expansion in competition with the British Royal Navy. In the same year he became a member of the Prussian House of Lords.

In 1915, after World War I broke out, he was recalled to duty to serve as head of the Imperial Admiralty Staff. During his retirement Holtzendorff converted into a strong proponent of unrestricted submarine warfare. He published a memo in December 1916 that was presented to Kaiser Wilhelm II and approved at the Pless conference in January 1917. The belief that unrestricted submarine warfare would starve Britain and bring about its demise was predicted, with the statement that the United Kingdom will be forced to sue for peace within six months. He also stated that the risk of American intervention could be taken and ignored. His policy succeeded in disturbing both the Royal and the Merchant Navy with Allied shipping losses over 6 million GRT in 1917. His submarines became less successful when convoys were introduced, drew the US into the war and failed to beat Britain in time.