Treaty of Moscow
In the early 1970s, Willy Brandt's policy of "" led to a form of mutual recognition between East and West Germany. The Treaty of Moscow (August 1970), the Treaty of Warsaw (December 1970), the Four Power Agreement on Berlin (September 1971), the Transit Agreement (May 1972), and the Basic Treaty (December 1972) helped to normalise relations between East and West Germany and led to both German states joining the United Nations. The Hallstein Doctrine was relinquished, and West Germany ceased to claim an exclusive mandate for Germany as a whole.