In 1953, an uprising against the Party was met with violent suppression by the Ministry of State Security and the Soviet Army. In 1971, Ulbricht was succeeded by Erich Honecker who presided over a stable period in the development of the GDR until he was forced to step down during the 1989 revolution. The party's last leader, Egon Krenz, was unsuccessful in his attempt to retain the SED's hold on political governance of the GDR and was imprisoned after German reunification.