The Yalta Conference in the former Soviet Union was held between 4th February to 11th February, 1945 for the nature and structure of UNO by Churchill, Stalin arid Roosevelt. Decisions regarding veto power of the ‘Big Five’ in the UN Security Council were taken now. It also decided to convene a full scale United Nations Conference in San Francisco on 25th April, 1945 for the formulation of the Charter of the new organisation.