Poland was the first item on the Soviet agenda. Stalin said that “for the Soviet government, the question of Poland is a matter of honor” and security because Poland has served as a historic corridor for forces trying to invade Russia.  In addition, Stalin told history: “Because the Russians had sinned strongly against Poland,” “the Soviet government tried to atone for these sins.”  Stalin concluded that “Poland must be strong” and that “the Soviet Union is interested in creating a powerful, free and independent Poland.” As a result, Stalin stated that the demands of the Polish government in exile are not negotiable: the Soviet Union would retain the territory of eastern Poland, which it had already annexed in 1939, and Poland should be compensated by the expansion of its western borders at the expense of Germany. Contrary to his previously proclaimed position, Stalin promised free elections in Poland, although he recently had one of its members in the Soviet provisional government occupied by the Red Army. The Potsdam conference was held from July to August 1945, which was also attended by Clement Attlee (who had replaced Churchill as Prime Minister) and President Harry S Truman (who represented the United States after Roosevelt`s death).  In Potsdam, the Soviets disputed allegations that they had interfered in the affairs of Romania, Bulgaria and Hungary.  The conference led to (1) Potsdam`s declaration on Japan`s surrender and (2) the Potsdam Agreement on the Soviet annexation of the former Polish territory to the curzon Line and provisions that will be addressed in a possible final treaty to end the Second World War on the annexation of parts of Germany east of the Oder-Neisse line to Poland. and North-East Prussia to the Soviet Union. On March 1, Roosevelt assured Congress: “I come from Crimea with the firm conviction that we have begun on the road to a world of peace.”  However, the Western powers soon realized that Stalin would not keep his promise of free elections for Poland. After receiving considerable criticism in London after Yalta of the atrocities committed by Soviet troops in Poland, Churchill wrote a desperate letter to Roosevelt in which he referred to the large-scale deportations and liquidations of opposition Poles by the Soviets.  On March 11, Roosevelt replied to Churchill and wrote, “I am sure we must stand firm on a correct interpretation of Crimea`s decision. They rightly believe that neither the government nor the people of this country will support participation in fraud or mere deception by the Lublin government, and the solution must be as we imagined it in Yalta.  The Yalta Conference, also known as the Crimean Conference and Mitdemkodem Argonaut, took place from 4 to 11 February 1945 and was the meeting of the heads of government of the United States, the United Kingdom and the Soviet Union during World War II to discuss the reorganization of Germany and Europe after the war.
The three states were represented by President Franklin D. Roosevelt, Prime Minister Winston Churchill and Prime Minister Joseph Stalin. The conference took place near Yalta in Crimea, Soviet Union, in the Livadia, Yusupov and Vorontsov palaces. The aim of the conference was to organize a post-war peace that was not only a collective security order, but also a plan to give the liberated peoples of post-Nazi Europe self-determination. The meeting should focus on the restoration of the nations of war-torn Europe. But within a few years, as the Cold War divided the continent, Yalta became the subject of intense controversy.