In October 1943 the governments of the United States, the United Kingdom, the Soviet Union, and China declared that they would continue to cooperate with each other and with other United Nations in the war effort against the Axis powers. This declaration, made during the Moscow Conference of Foreign Ministers, reaffirmed the Allied commitment to collective security and postwar cooperation. The four powers, often referred to as the “Big Four,” pledged to maintain their alliance until victory was achieved and to work toward establishing a peaceful and secure international order. The statement emphasized unity in purpose and resolve, laying diplomatic groundwork for what would later become the United Nations organization. It underscored the shared responsibility of the major Allied nations in shaping the postwar world and reinforced the principle that lasting peace could only be built through sustained international collaboration. The declaration was a significant step in transforming wartime cooperation into a framework for global governance, reflecting the Allies’ determination to avoid the failures of the interwar period and to create institutions capable of preventing future conflicts.
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