Ruhrbesetzung
After , and Matthias Erzberger died, Marx became the head of the Reichstag fraction of the Centre Party on 27 September 1921 and, on 17 January 1922, party chairman. He supported Chancellor Joseph Wirth in his "Erfüllungspolitik" which attempted to comply with the Treaty of Versailles, notably the reparation demands of the Allies, as far as possible. Chancellor Wilhelm Cuno received Marx's help in mobilising civil disobedience against the Occupation of the Ruhr. However, Marx then helped to replace Cuno's cabinet with the Grand Coalition headed by Gustav Stresemann. When Stresemann's government fell in November 1923, Marx himself stepped up.