Stalin suggested that a unified, but demilitarised, German state be established, hoping that it would either come under Soviet influence or remain neutral. When the US and UK remained opposed to this, Stalin sought to force their hand by blockading Berlin in June 1948. He gambled that the others would not risk war, but they airlifted supplies into West Berlin until May 1949, when Stalin relented and ended the blockade. In September 1949 the Western powers transformed Western Germany into an independent Federal Republic of Germany; in response the Soviets formed East Germany into the German Democratic Republic in October. In accordance with their earlier agreements, the Western powers expected Poland to become an independent state with free democratic elections. In Poland, the Soviets merged various socialist parties into the Polish United Workers' Party, and vote rigging was used to ensure that it secured office. The 1947 Hungarian elections were also rigged, with the Hungarian Working People's Party taking control. In Czechoslovakia, where the communists did have a level of popular support, they were elected the largest party in 1946. Monarchy was abolished in Bulgaria and Romania. Across Eastern Europe, the Soviet model was enforced, with a termination of political pluralism, agricultural collectivisation, and investment in heavy industry. It was aimed for economic autarky within the Eastern Bloc.