As soon as the German-Soviet War broke out in June 1941, Churchill offered his help to the Soviets, and on July 12, 1941, a corresponding agreement was signed.  However, Churchill reminded listeners in a talk radio program announcing the alliance with the USSR that this alliance would not change his stance against communism.  Delegations had traveled between London and Moscow to organize the implementation of this support, and when the United States entered the war in December 1941, the delegations also met in Washington. A combined committee of the Chiefs of Staff was created to coordinate British and American operations and their support for the Soviet Union. The consequences of a world war, the absence of a unified Allied strategy, and the complexity of the distribution of resources between Europe and Asia had not yet been clarified and quickly led to mutual distrust between the Western Allies and the Soviet Union.  There was the question of opening a second front to reduce German pressure on the Soviet Red Army on the Eastern Front, the question of mutual support (where Britain and the Soviet Union sought credit and material support from the United States, and there were tensions between the United States and Britain because Washington had no desire to support the British Empire in the event of an Allied victory).  The US or Britain were also unwilling to give Stalin carte blanche in Eastern Europe, and after all, there was no common policy on how to deal with post-Hitler Germany. Communication on these issues between Churchill, Roosevelt and Stalin was through telegrams and emissaries – but it was obvious that direct negotiations were urgently needed.  On November 29, Roosevelt asked Stalin five questions about data and intelligence related to Japanese and Siberian ports, as well as air bases in the Maritime provinces that could accommodate up to 1,000 heavy bombers. On February 2, Stalin told the US ambassador that America could operate 1,000 bombers from Siberia after the Soviet Union declared war on Japan (Vladivostok is in the Russian Far East, not Siberia).  (4) noted that Operation OVERLORD would begin in May 1944 in conjunction with an operation against southern France.
The latter operation would be carried out at a force as high as the availability of landing craft allows. The conference also took note of Marshal Stalin`s statement that Soviet forces would launch an offensive at about the same time to prevent the transfer of German forces from the Eastern Front to the Western Front: the last of the three major war summits took place in Potsdam, southwest of Berlin. after the unconditional capitulation of Germany. The longest of the three, the Potsdam Conference, took place between 17 July and 2 August 1945. There were discussions between Stalin, who remained in power in the Soviet Union, and the new leaders of the United States and Britain. The United States was represented by President Harry Truman, who took office after Roosevelt`s death in April. The United Kingdom was represented by successive British prime ministers Winston Churchill and Clement Attlee, the change taking place in the middle of the conference after the 1945 general election. Discussions focused on issues arising from Germany`s defeat, while participants also discussed the ongoing war against Japan. As far as Germany is concerned, provisional agreements have been reached on a number of issues, including the redrawing of borders and the resettlement of the German population. Regarding the ongoing war in Asia, the United States and Britain, as well as China, issued a separate statement in late July calling for Japan`s immediate and unconditional surrender.
(The Soviet Union would declare war on Japan in August.) He warned that the alternative would be «immediate and complete destruction» for the country. The conference was scheduled to meet on November 28, 1943 at 4 p..m .m. Stalin arrived early, followed by Roosevelt, who brought his wheelchair from his accommodation next to the place. Roosevelt, who had traveled 7,000 miles (11,000 km) and whose health was already deteriorating, met Stalin for the first time. Churchill, walking with his staff from their nearby accommodation, arrived half an hour later. The alliance between the United Kingdom, the United States and the Soviet Union had initially operated by correspondence and a series of bilateral conferences. As the war progressed, however, it was planned to bring together the heads of government of these three Allied powers to discuss key issues arising from the conflict. The Tehran Conference (codenamed Eureka) was a strategic meeting of Joseph Stalin, Franklin D.
Roosevelt and Winston Churchill from November 28 to December 1, 1943. It was held at the Embassy of the Soviet Union in Tehran, Iran, and was the first conference of the «Big Three» of allied leaders (Soviet Union, United States and United Kingdom) during World War II. It closely followed the Cairo Conference, held from 22 to 26 November 1943, and preceded the Yalta and Potsdam Conferences in 1945. Although the three leaders arrived with different goals, the most important outcome of the Tehran conference was the commitment of the Western Allies to open a second front against Nazi Germany. The conference also discussed Allied relations with Turkey and Iran, operations in Yugoslavia and against Japan, and the planned post-war settlement. A separate protocol signed at the conference promised the Big Three to recognize Iran`s independence. This was reinforced by the theatrical culmination of the Tehran Conference, Churchill`s presentation of the Sword of Stalingrad to Stalin on the second day of deliberation. This magnificent ceremonial longsword, specially made by order of the British monarch, bore the inscription «To the steel-hearted citizens of Stalingrad, the gift of King George VI, as a sign of the tribute of the British people».
Stalin declared a particular interest in «good relations» with Poland, which needed to be rebuilt and expanded at the expense of Germany – but without the help of the current Polish government-in-exile, which was tainted with «slanderous propaganda against Russia» and by the simple fact that it was based in the West. Poland was also to become a Soviet «satellite state». Important discussions took place about the future of Germany after the war. But with his troops occupying much of Germany and Eastern Europe, Stalin was able to effectively ratify the concessions he had won at Yalta and reduce his advantage over Truman and Churchill (who was replaced by Prime Minister Clement Atlee in the middle of the conference). In March 1946, barely a year after the Yalta Conference, Churchill gave his famous speech declaring that an «Iron Curtain» had fallen on Eastern Europe, signaling the definitive end of cooperation between the Soviet Union and its Western allies and the beginning of the Cold War. Foreign Minister Antony Eden briefed the House of Commons on the decisions taken in Tehran shortly after his return to London. In a postponement debate, which took place during the 14th and 15th centuries. In December 1943, he spoke of the «complete agreement» reached on the scope and timing of future military operations against Germany, adding that they would soon be «deployed on the battlefields.» Mr. Eden also spoke of the foundations that had been laid for a post-war international order to ensure peace and progress after the end of hostilities. Viscount Cranborne briefed the House of Lords on developments at the Tehran conference the following day. In July and August, in the battles for the Kursk, Orel and Kharkov protrusions, the German forces were subjected to another blow that the Soviet forces were able to eliminate and after which they never lost the main initiative again. How did these three giants get along on the world stage in Tehran? Although Roosevelt presided over all the plenary sessions of the conference, it was undoubtedly the cunning Stalin who dominated the process from the beginning, effectively pitting Roosevelt and Churchill against each other to push through his own agenda.
The US president was almost immediately disadvantaged by being placed in the Soviet embassy (supposedly for logistical and security reasons), where Stalin`s secret police could focus their eyes and ears on him. .