<Tr> <Th> Follows </Th> <Td> Tehran Conference </Td> </Tr> <Tr> <Th> Precedes </Th> <Td> Potsdam Conference </Td> </Tr> <P> The Yalta Conference, also known as the Crimea conference and code named the Argonaut Conference, held from February 4 to 11, 1945, was the World War II meeting of the heads of government of the United States, the United Kingdom and the Soviet Union for the purpose of discussing Europe's postwar reorganization . The three states were represented by President Franklin D. Roosevelt, Prime Minister Winston Churchill and Premier Joseph Stalin, respectively . The conference convened in the Livadia Palace near Yalta in Crimea, Soviet Union . </P> <P> The aim of the conference was to shape a post-war peace that represented not just a collective security order but a plan to give self - determination to the liberated peoples of post-Nazi Europe . </P>

Why did the allies decided have to have a conference at yalta
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