Treaty of Versailles: A peace treaty signed in 1919 that officially ended World War I between Germany and the Allied Powers. It imposed harsh penalties on Germany for its role in starting the war.
League of Nations: An international organization established after World War I with the goal of maintaining world peace. It was proposed by President Woodrow Wilson as part of his Fourteen Points plan.
Roaring Twenties: A decade of economic prosperity and cultural transformation in the United States during the 1920s. It was marked by increased industrialization, urbanization, consumerism, and significant social changes.