The diplomacy of the American Civil War involved the relations of the United States and the Confederate States of America with the major world powers during the American Civil War of 1861–1865. The United States prevented other powers from recognizing the Confederacy, which counted heavily on Britain and France to enter the war on its side to maintain their supply of cotton and to weaken a growing opponent. Every nation was officially neutral throughout the war, and none formally recognized the Confederacy.