Two sessions had to be convened because the Soviets did not want appear together with the Chinese representatives, although the Chinese are said to have contributed little.  
It was called in response to paragraph four of the Moscow Declaration of the previous year.  Two sessions had to be convened because the Soviets did not want appear together with the Chinese representatives, although the Chinese are said to have contributed little.  Although the general structure of an organization was decided upon, the Soviet delegation, led by Gromyko, insisted that any nation in the Security Council be allowed to veto matters that concerned it, a demand that the Americans, represented by Ralph Bunche and Alger Hiss, opposed.  FTP, name this 1944 conference that concerned the creation of the eventual United Nations, named for the Washington DC estate where it was held.
It was called in response to paragraph four of the Moscow Declaration of the previous year.  
Dumbarton Oaks