Erich Friedrich Wilhelm Ludendorff (sometimes given incorrectly as von Ludendorff) (9 April 1865 – 20 December 1937) was a German Army officer, victor of Liège, and, with Paul von Hindenburg, one of the victors of the battle of Tannenberg. From August 1916 his appointment as Generalquartiermeister made him joint head (with von Hindenburg) of Germany's war effort. From this point on he ran Germany's war effort in World War I until his resignation in October 1918.