As diplomats and politicians tried to shape the post-war world, Soviet troops from the east and Allied troops from the West continued to advance towards Germany. After a bitter and costly battle, Berlin fell to Soviet forces on 8 May 1945, after Allied and Soviet troops met on the Elbe to shake hands and congratulate each other on a hard-won victory. Although the war was over in Europe, it took a few more months of fierce fighting and significant losses for allied forces to defeat the Japanese in September 1945, including the first use of the atomic bomb. In accordance with the Yalta Accords, the Soviet Union declared war on Japan in early August 1945, just before Japan surrendered in September. Churchill and U.S. President Franklin Delano Roosevelt had been working together for some time when the United States went to war in 1941. Roosevelt believed that a British victory on the axis was in America`s best interest, while Churchill believed that such a victory was not possible without American help. In 1940, the two heads of state worked to find ways for America to help Britain continue without violating its neutrality. The following year, they met off the coast of Newfoundland to begin planning for the post-war world. The Soviet Prime Minister, Joseph Stalin, was a late complement to the Big Three. On New Year`s Day 1942, representatives of the three nations signed the United Nations Declaration and pledged to unite to defeat the Axis powers.
The United States welcomed the Russian Democratic Revolution of February 1917 with great enthusiasm, which cooled considerably with the advent of the Bolsheviks in October 1917. The United States and many other countries have refused to recognize the new regime and have argued that it is not a democratically elected or representative government. The policy of non-recognition ended in November 1933, when the United States, under President Franklin D. Roosevelt, established full diplomatic relations with the Soviet Union, the last great power. These coordinated military actions emerged as a result of intense and lengthy diplomatic negotiations between Allied leaders Roosevelt, Churchill and Stalin, known as the Big Three. The Tehran Conference in November 1943 was one of those war conferences, which also addressed issues of the post-war world. In Tehran, Stalin of Roosevelt and Churchill made sure to confirm the launch of the inter-50th invasion. In return, Stalin promised his allies that the Soviet Union would eventually go to war with Japan. In February 1945, the “Three Greats” met in Yalta, Crimea. The Yalta conference was the most important – and by far the most controversial – of the war sessions.
Recognizing the Soviet army`s position of strength on the ground, Churchill – and a sick Roosevelt – accepted a number of things with Stalin. In Yalta, they granted territorial concessions to the Soviet Union and outlined sanctions against Germany, including allied occupation and the principle of reparations. Stalin guaranteed that the Soviet Union would declare war on Japan within six months of the end of hostilities in Europe. The end of the war marked the end of the Great Alliance. Roosevelt died in April 1945 and was appointed by his vice president Harry S.