What was the name of the treaty that the Big Four came up with when the war was over?

The treaty that the Big Four—comprising leaders from the United States, United Kingdom, France, and Italy—negotiated at the end of World War I was the Treaty of Versailles. Signed on June 28, 1919, it imposed significant reparations and territorial losses on Germany, aimed at preventing future conflicts. The treaty also established the League of Nations, an international organization intended to promote peace and cooperation among countries.