"'The Sphinx'"@en . "1936Z"^^ . . . "1866-04-22Z"^^ . . . "Seeckt, Hans von"@en . . . "1926Z"^^ . "Eleventh Army" . . "Hans von Seeckt"@en . "1866Z"^^ . . "German general" . . "1936-12-27Z"^^ . "1885Z"^^ . "Nazi Germany" . . "Johannes Friedrich \"Hans\" von Seeckt (22 April 1866 \u2013 27 December 1936) was a German military officer who served as Chief of Staff to August von Mackensen, and was a central figure in planning the victories Mackensen achieved for Germany in the east during the First World War.During the years of the Weimar Republic he was chief of staff for the Reichswehr from 1919 to 1920 and commander in chief of the German Army from 1920 until he resigned in October 1926."@en .