military control by the USSR via the latter's occupation forces and the Warsaw Pact. Though East Germany claimed to be a democracy, political power was exercised solely by leading members (Politbüro) of the communist-controlled Socialist Unity Party of Germany (SED), supported by the Stasi, an immense secret service, and a variety of sub-organisations controlling every aspect of society. A Soviet-style command economy was set up; the GDR later became a Comecon state. While East German propaganda was based on the benefits of the GDR's social programmes and the alleged constant threat of a West German invasion, many of her citizens looked to the West for freedom and prosperity. The Berlin Wall, built in 1961 to stop East Germans from escaping to West Germany, became a symbol of the Cold War., hence its fall in 1989, following democratic reforms in Poland and Hungary, became a symbol of the Fall of Communism,
Tensions between East and West Germany were reduced in the early 1970s by Chancellor Willy Brandt's Ostpolitik. In summer 1989, Hungary decided to dismantle the Iron Curtain and open the borders, causing the emigration of thousands of East Germans to West Germany via Hungary. This had devastating effects on the GDR, where regular mass demonstrations received increasing support. The East German authorities unexpectedly eased the border restrictions, allowing East German citizens to travel to the West; originally intended to help retain East Germany as a state, the opening of the border actually led to an acceleration of the Wende reform process. This culminated in the Two Plus Four Treaty a year later on 12 September 1990, under which the four occupying powers renounced their rights under the Instrument of Surrender, and Germany regained full sovereignty. This permitted German reunification on 3 October 1990, with the accession of the five re-established states of the former GDR (new states or "neue Länder").
German reunification and the
