| A | B |
| Stalemate | No Winner |
| Armistice | Agreement to stop fighting |
| Sarajevo | City Archduke was assassinated |
| Ultimatum | No Choice; Do it or else |
| Assassination | Murder by secret attack on a person |
| Triple Entente | England, France, Russia |
| Triple Alliance | Germany, Austria -- Hungary, Italy |
| Alliance | Agreement to help another country |
| Imperialism | Attempt to control another nation |
| Militarism | Arms Race |
| Nationalism | Devotion to one's country |
| Rivalry | Competition |
| Central Powers | Germany, Austria-Hungary, & its Allies |
| Allies | Countries that fought with U.S. in WWI |
| Western Front | France |
| Eastern Front | Russia |
| Trenches | Series of ditches used by soldiers |
| Neutral | Not taking sides |
| Propaganda | Spreading of ideas & beliefs |
| Submarine | Destructive underwater vessel |
| U-Boat | another name for a submarine |
| Reparations | War Debts |
| Treaty of Versailles | Treaty ended WWI for Europeans |
| Peace Conference | Talks held to try & resolve a conflict |
| Lusitania | Br. liner sunk by German u-boat |
| Zimmerman Note | Ger. message urging Mexico to declare war on U.S. |
| Bollshiveks | Led a revolution in Russia |
| Selective Service | Another name for the draft |
| Liberty Bonds | Sold by U.S. gov't. to raise money |
| Pacifists | People who opposed the war |
| Brest-Litovsk | Treaty that took Russia out of WWI |
| Blockade | Obstacle that prevents a passing |
| No-man's Land | Land between the trenches |
| Fourteen Points | Wilson's peace plan |
| Self-determination | Right to live & govern oneself freely |
| League of Nations | World Organization to try & keep peace |