feed about six million expelled German citizens from former eastern Germany and four million expelled and denaturalised Czechoslovaks, Poles, Hungarians and Yugoslavs of German ethnicity in their zones, France generally had not agreed to the expulsions approved by the Potsdam agreement (a decision made without input from France). Therefore, France strictly refused to absorb war refugees who were denied return to their homes in seized eastern German territories or destitute post-war expellees who had been expropriated there, into the French zone, let alone into the separated Saar protectorate. However, the native population, returning after Nazi-imposed removals (e.g., political and Jewish refugees) and war-related relocations (e.g., evacuation from air raids), were allowed to return home in the areas under French control. The other Allies complained that they had to shoulder the burden to feed, house and clothe the expellees who had to leave their belongings behind. In practice, each of the four occupying powers wielded government authority in their respective zones and carried out different policies toward the population and local and state governments there. A uniform administration of the western zones evolved, known first as the Bizone (the American and British zones merged as of 1 January 1947) and later the Trizone (after inclusion of the French zone). The complete breakdown of east–west allied cooperation and joint administration in Germany became clear with the Soviet imposition of the Berlin Blockade that was enforced from June 1948 to May 1949. The three western zones were merged to form the Federal Republic of Germany (FRG) i.e. West Germany in May 1949, and after that the Soviets followed suit in October 1949 with the establishment of the German Democratic Republic (GDR) i.e. East Germany. In the west, the occupation continued until 5 May 1955, when the General Treaty () entered into force. However, upon the creation of the Federal Republic in May 1949, the military governors were replaced by civilian high commissioners, whose powers lay somewhere between those of a governor and those of an ambassador. When the Deutschlandvertrag became law, the occupation ended, the western occupation zones ceased to exist, and the high commissioners were replaced by normal ambassadors. West Germany was also allowed to build a military, and the Bundeswehr, or Federal Defense Force, was established on 12 November 1955. A similar situation occurred in East Germany. The GDR was founded on 7 October 1949. On 10 October the Soviet Military