| A | B |
| Archduke Franz Ferdinand | his assassination started WWI |
| nationalism | intense loyalty to your country/ethnicity |
| imperialism | acquiring colonies, building an empire |
| militarism | building up your military |
| alliance | "pinkie swears" to protect each other |
| balance of power | no single country or alliance can dominate |
| Allied Powers | Gr Br, France, Russia, Italy, Belgium, Serbia, U.S. |
| Central Powers | Germany, A-H, Ottoman Emp, Bulgaria |
| Western Front | line of fighting in eastern France |
| stalemate | neither side can win |
| unrestricted sub warfare | firing upon unarmed merchant ships |
| Lusitania sinking | almost got U.S. into WWI |
| Zimmermann telegram | Germany asked Mex to attack U.S. - we entered WWI |
| conscription | mandatory military service |
| Selective Service Act of 1917 | provided for a U.S. draft in WWI |
| Fourteen Points | Woodrow Wilson's plan for peace |
| League of Nations | Wilson's most important point |
| would weaken power of Congress | why we didn't join League of Nations |
| armistice | agreement to stop the fighting |
| Treaty of Versailles | main peace treaty ending WWI |
| reparations | payment for damages caused by war |
| trench warfare | cause of the stalemate on the Western Front |