a war between the allies (Russia, France, British Empire, Italy, United States, Japan, Rumania, Serbia,
Belgium, Greece, Portugal, Montenegro) and the central powers (Germany, Austria-Hungary, Turkey, Bulgaria) from 1914 to 1918
Reason for U.S. involvement- unrestricted submarine warfare by the Germans and support for the Allies led to U.S. involvement in WW1 in 1917
Treaty of Versailles- the treaty ending WW1 that redrew the map of Europe, blamed Germany for the war.
Wilson's Fourteen Points- and provision for The League of Nations represents President Wilson's goals for nations to have self-determination and an international peacekeeping forum. The U.S. Senate refused to ratify the Treaty and participate in the League of Nations