| A | B |
| Slavs | people of eastern Europe whose language came from the same basic root. |
| Ally | A country associated with another country, and willing to help it. |
| Sarajevo | City in Bosnia where the Archduke Ferdinand was assissinated. |
| Serbia | Nation that Austria-Hungary declared war on to start WWI. |
| Germany | Supported Austria-Hungary |
| BAGO | Central Powers during WWI (Bugaria, Ottoman Empire, Germany, Austria-Hungary). |
| Poison Gas | Germany was the first country to use this weapon. |
| Tanks | Britain was the first country to use this weapon. |
| ACE Pilot | A pilot who shot down 5 or more planes. |
| Kaiser Wilhelm II | Leader of Germany |
| Emperor Franz Joseph | Leader of Austria-Hungary |
| Tsar Nicholas II | Leader of Russia |