This Day in History:, First Meeting of br the United Nations.br January 10, 1946.br The first U.N. meeting, br comprised of 51 nations,br convened at Westminster br Central Hall in London.br The groundwork for this first meeting br had been laid by the Allies in 1944 br at the Dumbarton Oaks br conference in Washington, D.C.br The United Nations Charter br was drafted by the nations br a year later in San Francisco.br The new organization br was to yield much more br power over its members than br the defunct League of Nations.br Two weeks after its first meeting, br the General Assembly adopted br its first resolution:.