The victorious European and American powers drafted the Treaty of Versailles to settle affairs at the end of World War I. This Treaty also created the League of Nations, a prototype United Nations.
U.S. President Woodrow Wilson was a staunch supporter of the League of Nations; the U.S. Senate, which by constitutional fiat must ratify treaties before they become the law of the land, was not, and ultimately voted against the Treaty. (The United States’ formal acknowledgment of the end of hostilities was the Porter-Knox Resolution, an act of the U.S. Congress passed in 1921 and signed by Warren G. Harding, Wilson’s successor.)