| A | B |
| nationalism | A devotion to the interests and culture of one's nation |
| militarism | Building up armed forces to prepare for war |
| Allies | One side in WWI: Great Britain, France, & Russia (later U.S.) |
| Central Powers | One side in WWI: Germany, Austria-Hungary, & the Ottoman Empire |
| Archduke Franz Ferdinand | Young heir whose assassination triggered the war |
| no man's land | The space between armies fighting each other |
| trench warfare | Fighting between fortified ditches |
| Lusitania | British passenger ship attacked and sunk by Germans |
| Zimmermann note | Message proposing an alliance between Germany and Mexico |
| Selective Service Act | Law requiring men to register for military service |
| convoy system | Having merchant ships travel in groups protected by warships |
| American Expeditionary Force | The name given to the American military force that fought in WWI |
| General John J. Pershing | The commander of the American Expeditionary force |
| Eddie Rickenbacker | Famous American fighter pilot |
| Alvin York | Amercian war hero |
| conscientious objector | A person who believes fighting is wrong and therefore does not want to serve in the military |
| armistice | Truce Agreement |
| War Industries Board | Agency to improve efficiency in war-related industries |
| Bernard M. Baruch | Leader of the War Industries Board |
| propaganda | A kind of biased communication designed to influence people's thoughts and actions |
| George Creel | Head of the Committee on Public Information (CPI), the government's propaganda agency |
| Espionage and Sedition Acts | Laws that enacted harsh penalties against anyone opposing US participation in WWI |
| Great Migration | Movement of many African Americans to northern cities from the South in the early 1900s |
| Fourteen Points | Wilson's plan for world peace following WWI |
| League of Nations | An international peace-keeping organization proposed by Wilson and founded in 1920 |
| Georges Clemenceau | French premier |
| David Lloyd George | British prime minister |
| Treaty of Versailles | The 1919 treaty that ended WWI |
| reparations | Payments made by defeated countries after a war |
| war-guilt clause | Part of the Treaty of Versailles in which Germany took responsibility for the war |
| Henry Cabot Lodge | Conservative senator who wanted to keep the US out of the League of Nations |