| A | B |
| Archduke Francis Ferdinand | his death "sparked" war |
| Imperialism | when a strong nation takes over a weaker nation |
| Militarism | build up of the military/preparation for war |
| Nationalism | pride in your own culture/desire for statehood |
| Convoy | naval method of protecting supplies with destroyers |
| Allies | Britain, France,Russia, Serbia |
| U-boat | Submarine--German |
| Autocrats | Absolute rulers |
| Sussex Pledge | Germany won't use U-boats without warning |
| Zimmerman note | Germany give land to Mexico |
| Lusitania | British ship, sunk in war |
| Preparedness | readiness for war |
| No-man's land | empty land between armies |
| Stalemate | no movement possible by either side |
| Pacifist | opposed to war |
| Alliances | agreements for support |
| Woodrow Wilson | "He kept us out of war." |
| Declaration of War | "Make the world safe for Democracy" |
| Battle of Somme | enormous #'s of dead |
| Nicholas II | last Tsar/Czar of Russia |