Pursuant to the Moscow Declarations, from 21 August 1944 to 7 October 1944, the U.S. hosted the Dumbarton Oaks Conference to develop a blueprint for what would become the United Nations. Many of the rules, principles, and provisions of the UN Charter were discussed proposed during the conference, including the structure of the UN system; the creation of a "Security Council" to prevent future war and conflict; and the establishment of other "organs" of the organization, such as the General Assembly, International Court of Justice, and Secretariat. The conference was led by the Big Four, with delegates from other nation participating in the consideration and formulation of these principles.