| A | B |
|---|
| alliance system | defense agreements among countries for protection |
| nationalism | intense loyalty to your country |
| expansionism | the desire to add more land to your country |
| militarism | the increase of a country's armed forces |
| ethnic groups | people who share a common language and traditions |
| entente | an understanding between nations similar to an alliance |
| balance of power | a system that prevents any one country from dominating others |
| ultimatum | an official letter from one country to another containing demands |
| Triple Alliance | Germany, Austria-Hungary, and Italy's self-defense agreement |
| Triple Entente | Great Britain, France, and Russia's self-defense agreement |
| main Central Powers | Germany, Austria-Hungary, the Ottoman Empire, and Bulgaria |
| Allied Powers | Great Britian, France, Russia, Italy, Japan, and eventually the U.S |
| Archduke Franz Ferdinand | assassinated heir to the Austro-Hungarian empire |
| Gavrilo Princip | Archduke Ferdinand's assassin |
| 28 June 1914 | date on which Archduke Ferdinand was murdered |
| 28 July 1914 | date on which WWI began |
| mobilize | to prepare military forces for war |
| Verdun | bloodiest battle of WWI |
| U-boat | German name for submarine |
| Marne | river near Paris, France where Germans launched offensive |
| offensive | the conducting of an attack by a military force |
| defensive | the defending of property by a military force |
| dreadnought | a supersized battleship |
| Front | the line of battle separating opposing forces |
| dogfight | a fight between airplanes |
| Ottoman Empire | former name for present country of Turkey |
| Kaiser Wilhelm | ruler of Germany in WWI |
| Balkan Peninsula | Southeastern Europe's hotbed of conflict |
| Serbia | country in the Balkans supporting Slavic people's independence |
| Sarajevo | major city in Southeastern Austria-Hungary where the Archduke was assassinated |
