On this day, 82 years ago, on November 28, 1943 (November 2, 1943 in the lunar calendar), the Tehran Conference of the United States, the Soviet Union and Britain opened. Stalin (left), Roosevelt (center), and Churchill (right) in Tehran In order to defeat the German-Japanese fascists as soon as possible and end the war as soon as possible, U.S. President Roosevelt, British Prime Minister Churchill and Chairman of the Soviet Council of Ministers Stalin met from November 28 to December 1943. The first meeting was held in Tehran, the capital of Iran. It is known as the "Tehran Conference" in history. The central topic of the meeting was the issue of opening up a second battlefield. The heads of state of the three countries reached an agreement: the Battle of Overlord to attack Western Europe and the Battle of Southern France would be launched simultaneously in May 1944, with a landing force of 1 million people. The Soviet Union promised to attack the Germans at the same time to coordinate with the Allied actions on the Western Front. Regarding the issue of war against Japan, the Soviet Union initially agreed to participate in the war against Japan about half a year after the end of the European War. In exchange, Soviet troops could enter China's ice-free port of Dalian, and Dalian could become a free port under international supervision. This request by the Soviet Union was not approved by the National Government of China, which harmed China's interests. The meeting also held consultations on post-war world arrangements. No specific agreement was reached on the disposal of post-war Germany and the Polish border issue. Both the United States and Britain advocate dividing Germany, the United States advocates dividing Germany into five, and the United Kingdom advocates merging southeastern Germany with other countries to form a federation. The Soviet Union was more cautious about this issue. Stalin believed that it was not Germany that should be destroyed, but the "Hitler State". Therefore, Stalin advocated that Prussian militarist forces must be completely eliminated. Discussions on this issue at the meeting were inconclusive. The Polish issue was also one of the important topics at the Tehran meeting. The Polish territory occupied by the Soviet Union in September 1939 was roughly the territory acquired by the Russian government during the third partition of Poland in 1795. In addition, most areas of Eastern Galicia and Lithuania have been added. The British and American governments have always believed that any change in Polish territory in 1939 was unacceptable, while the Soviet government insisted that no change in territory before Germany invaded the Soviet Union in June 1941. At a roundtable meeting on December 1, Roosevelt flatly refused. Churchill considered that the Soviet army had crossed the border and marched westward on the battlefield, and Poland might fall completely into the hands of the Soviets, so he improvised and took the initiative to cater to the Soviet Union's demands, proposing to move the Polish border westward from the "Curzon" line in the east to the Oder River, using German leadership to compensate Poland for its lost territory in the east. The purpose of Churchill's proposal was to try to satisfy the Soviet Union's border requirements in exchange for recognition of Britain's interests in the Balkans. Stalin certainly agreed with Churchill's suggestion. Roosevelt did not express any objection to Churchill's opinion, but only asked that it not be leaked before the U.S. election, because the decision was related to the vote of 6 - 7 million Polish Americans. In this way, a few major countries, the United States, the Soviet Union, reached an agreement for their respective interests and made the decision to dispose of Polish territory behind the Polish people's back. The Tehran Conference also exchanged views on post-war international organizations and agreed to establish a non-regional, world-wide international organization to maintain post-war order and stability. The Tehran Conference was a meeting of great historic significance in the Second World War. First, for the first time in the history of the Anti-Fascist Alliance, it coordinated military strategies against the common enemy and adopted a unified combat plan for the Eastern and Western allies to jointly attack Hitler's Germany, laying the foundation for the decisive victory in the Anti-Fascist War in Europe in 1944., thus having a significant impact on the process and outcome of the war. Secondly, this meeting resolved some of the major contradictions and differences that had existed for a long time among the three major powers of the United States, Britain and the Soviet Union, enhanced mutual understanding and trust between them, and consolidated the unity and cooperation of the international anti-fascist alliance, which in turn provided a basis for the allies to resolve other issues and cooperation in rebuilding post-war world peace. At the same time, at the Tehran Conference, the three major powers also reached certain compromises for their own interests that harmed the interests of other countries, which had a negative impact on the post-war world. The meeting ended on December 1.