From July to August 1990 the two German parliaments held three rounds of negotiations towards an agreement on the framework for unification. After intense debate about its content, the Unification Treaty was signed at the end of August.
One aspect of the repressive state's legacy, the files held by the Ministry of State Security (Stasi), was particularly controversial. In autumn 1990, after impassioned protests against their own government and that of West Germany, the East Germans achieved the opening of the files kept by the SED's dreaded secret police.
Five new Länder (federal states) were formed on the territory of the former GDR, reorganising the state to fit the West German federal system. Many people welcomed the return of the historical Länder structure. In the first all-German parliamentary elections the majority in both East and West Germany voted for conservative parties.