League of Nations: An international organization formed after World War I aiming at promoting peace among nations; however, it failed largely because U.S., despite Wilson’s efforts, never joined due to opposition from isolationists in Congress.
Versailles Treaty: The treaty ended World War I and demanded exorbitant reparations from Germany. Wilson played a key role in its drafting.
Isolationism: A policy of remaining apart from the affairs or interests of other groups, especially the political affairs of other countries. Despite Wilson's internationalist outlook, many Americans favored isolationism after World War I.