Allied troops gathered again on 17 July of the same year for the Potsdam Conference. The summit, which lasted until 2 August, brought together the heads of state and government of the Soviet Union, the United States and Great Britain. By that time, Roosevelt was dead and Churchill had lost the 1945 election, so there were open disagreements during the conference. The purpose of the meeting was to discuss how best to punish Nazi Germany and to build on the decisions of the Von Naalta Conference. After the conference, Churchill wrote to Roosevelt that the Soviet Union had become a threat to the free world. And on their return home, he and Roosevelt were criticized for giving too much to the Soviets: the Potsdam conference was after the Kanta conference. The Potsdam took place in August 1945. The Potsdam meeting was the third conference between the leaders of the three great nations. In addition, German society was to be democratically restructured by repealing all discriminatory laws of the Nazi era and by arresting and trial germans as « war criminals. » The German education and justice system should be cleansed of authoritarian influences and democratic political parties should be encouraged to participate in the administration of Germany at the local and state level. However, the re-establishment of a German national government was postponed indefinitely, and the Allied Control Commission (composed of four occupying powers, the United States, Great Britain, France and the Soviet Union) was to govern the country during the interregnum. .