Militarism

Central Powers

Allies

U-boat

Woodraw Wilson

Neutrality

Zimmermann Telegram

John J. Perishing

American Expeditionary Force

Convoy system

Second Battle of the Marne

Alvin York

Armistice

War bonds

Propaganda

Espionage Act

Sedition Act

Oliver Wendell Holmes

Great Migration

League of Nations

Fourteen Points

Treaty of Versailles

Reparations

Red Scare