The Tehran conference was also one of the first discussions on the formation of the United Nations. President Roosevelt first introduced Stalin to the idea of an international organization that encompasses all nation-states, a place for solving common problems and revising international aggressors. After Germany plunged the world into chaos for the second time in as many generations, the three world leaders agreed that something had to be done to avoid a similar event.  How did these three giants come together on the world stage in Tehran? Although Roosevelt presided over all the plenary sessions of the conference, it was undoubtedly the astute Stalin who dominated the proceedings from the beginning and effectively opposed Roosevelt and Churchill to impose his own agenda. The American president was almost immediately disadvantaged by being housed in the Soviet embassy (supposedly for logistical and security reasons), where Stalin`s secret policemen could turn to him. According to Soviet history, Otto Skorzeny`s special forces worked on a plan to assassinate Churchill, Roosevelt and Stalin during the conference to be held in Tehran. It was known as Operation Big Jump. Churchill proposed a meeting in London. Stalin insisted on meeting in Tehran, despite the distance Roosevelt and Churchill had to travel. Stalin, who was flying for the first time in his life, arrived first. Roosevelt and Churchill arrived from Cairo where a conference on Japan and Asia was held. The “big three” also agreed on the principle of the division of Germany.
The annexation of Konigsberg by the Soviet Union and the expulsion of Poland (whose government in exile was neither informed nor consulted in London) to the West was agreed. The three governments are aware that the war has posed particular economic difficulties for Iran and have all agreed that they will continue to provide the Iranian government with as much economic assistance as possible, given the high demands placed on them by their global military operations and the global shortage of transport, raw materials and supplies for civilian consumption.  The conference was scheduled to be convened on November 28, 1943 at 4 p.m. Stalin arrived long before, followed by Roosevelt, brought his wheelchair from his accommodation next to the event venue. Roosevelt, who had travelled 11,000 kilometres to participate and whose health had already deteriorated, was received by Stalin. It was the first time they met. Churchill, who was walking with his coworkers from the neighbouring dwellings, arrived half an hour later.  According to Charles Bohlen, translator for FDR, FDR was accompanied by Averell Harriman and Harry Hopkins. Stalin was accompanied by Vyacheslav Molotov and Kliment Voshilov.
Churchill brought Anthony Eden and Lord Ismay, and his translator was Major Arthur Birse. On December 1, 1943, the three heads of state and government met, made statements and negotiated the following military conclusions at the conference. Churchill made this decision on the basis of reports that the partisans did much more harm to the Germans than the Chetniks. Churchill had no idea that these reports greatly exaggerated the number of dissident groups and minimized Mihailovic`s troops. This is due to the influence of the “Five of Cambridge”, a group of Secret Service agents who worked for the NKD6. 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, after the Anglo-Soviet invasion of Iran.