Hermann Ehrhardt (29 November 1881 – 27 September 1971) was a German naval officer in World War I who became an anti-republican and antisemitic German nationalist Freikorps leader during the Weimar Republic. As head of the Marine Brigade Ehrhardt, he was among the best-known Freikorps leaders in the immediate postwar years. The brigade fought against the local soviet republics that arose during the German Revolution of 1918–1919 and later was among the key players in the anti-republican Kapp Putsch of March 1920. After the brigade's forced disbanding, Ehrhardt used the remnants of his unit to