<Tr> <Th> Participants </Th> <Td> Winston Churchill (Prime Minister: United Kingdom), Franklin D. Roosevelt (President: United States) Joseph Stalin (Premier: Soviet Union) </Td> </Tr> <Tr> <Th> Outcome </Th> <Td> Consensus to open a second front against Nazi Germany by 1 May 1944 </Td> </Tr> <P> The Tehran Conference (codenamed Eureka) was a strategy meeting of Joseph Stalin, Franklin D. Roosevelt, and Winston Churchill from 28 November to 1 December 1943, after the Anglo - Soviet Invasion of Iran . It was held in the Soviet Union's embassy in Tehran, Iran . It was the first of the World War II conferences of the "Big Three" Allied leaders (the Soviet Union, the United States, and the United Kingdom). It closely followed the Cairo Conference which had taken place on 22--26 November 1943, and preceded the 1945 Yalta and Potsdam conferences . Although the three leaders arrived with differing objectives, the main outcome of the Tehran Conference was the Western Allies' commitment to open a second front against Nazi Germany . The conference also addressed the' Big Three' Allies' relations with Turkey and Iran, operations in Yugoslavia and against Japan, and the envisaged post-war settlement . A separate protocol signed at the conference pledged the Big Three to recognize Iran's independence . </P> <P> As soon as the German - Soviet war broke out in June 1941, Churchill offered assistance to the Soviets, and an agreement to this effect was signed on 12 July 1941 . Delegations had traveled between London and Moscow to arrange the implementation of this support and when the United States joined the war in December 1941, the delegations met in Washington as well . A Combined Chiefs of Staff committee was created to coordinate British and American operations as well as their support to the Soviet Union . The consequences of a global war, the absence of a unified Allied strategy and the complexity of allocating resources between Europe and Asia had not yet been sorted out, and soon gave rise to mutual suspicions between the Western Allies and the Soviet Union . There was the question of opening a second front to alleviate the German pressure on the Soviet Red Army on the Eastern Front, the question of mutual assistance (where both Britain and the Soviet Union were looking towards the United States for credit and material support and there was tension between the United States and Britain since Washington had no desire to prop up the British Empire in the event of an Allied victory). Also, neither the United States nor Britain were prepared to give Stalin a free hand in Eastern Europe and, lastly, there was no common policy on how to deal with Germany after Hitler . Communications regarding these matters between Churchill, Roosevelt, and Stalin took place by telegrams and via emissaries--but it was evident that direct negotiations were urgently needed . </P>

Which big three allied leaders met at teheran in 1943