The United Nations War Crimes Commission was established on 20 October 1943, by a meeting of Government representatives of seventeen of the Allied Nations, including all of the major powers except the USSR at the Foreign Office in London. The first official meeting was held on 11 January 1944, and the Commission continued its work actively until the end of March 1948. Source: http://search.archives.un.org/reel-34-folder-15835-pt-1of2-pgs-49