The meaning of the word changed over time. After 1918, the word was used for the paramilitary organizations that were started in Germany by soldiers who came home after losing World War I. They were the main paramilitary groups during that time. Many of these returning soldiers were not able to return to a normal life, and joined a Freikorps to again be a part of a military structure. Others were angry at losing the war and joined to fight against Communists or get revenge. They were liked and supported by Minister of Defence Gustav Noske, a member of the Social Democratic Party of Germany, who used them to stop the German Revolution and the Marxist Spartacist League, and also to murder Karl Liebknecht and Rosa Luxemburg on 15 January 1919. They were also used to defeat the Bavarian Soviet Republic in 1919.