| A | B |
| Archduke Franz Ferdinand | his assassination sparked WWI |
| Black Hand | secret organization planning an assassination |
| Unrestricted submarine warfare | ignoring the rules of torpedoing non-military ships |
| John J. Pershing | commander of the US forces during WWI |
| Triple Entente | alliance of Britain, France, and Russia |
| Powder Keg | word describing Europe's militarism and alliances |
| Zimmermann Note | telegram from Germany to Mexico |
| Fourteen Points | Woodrow Wilson's proposal of what to do after the war |
| League of Nations | countries joined together to solve problems before they become wars |
| Trench Warfare | method that created much stalemate in WWI |
| Central Powers | name given to Germany and Austria-Hungary during the war |
| American Expeditionary Force | U.S. military unit travelling overseas |
| Russian Revolution | reason why one major ally has to leave the war |
| Draft or Enlist | two ways the U.S. raised an army |
| War Bond | way the average citizen could give money to the war effort |
| reparations | to pay back for damages caused |
| Treaty of Versailles | Treaty concluding WWI |
| Woodrow Wilson | U.S. President during WWI |
| armistice | agreement to end fighting |
| Triple Alliance | alliance of Germany, Austria-Hungary, and Italy |