| A | B |
|---|
| New Weapon | Poison Gas |
| New Weapon | Submarine (U-Boat) |
| New Weapon | Airplane |
| General Reason for the Start of the War | Nationalism |
| General Reason for the Start of the War | Imperialism |
| General Reason for the Start of the War | Militarism |
| General Reason for the Start of the War | System of Alliances |
| Archduke Franz Ferdinand | Assasination started the war |
| Woodrow Wilson | President, U.S. |
| David Lloyd George | PM of England |
| Clemenceau | Leader of France |
| Orlando | PM of Italy |
| Imperalism | Taking of a colony for raw materials and markets |
| Ypres | First use of Poison Gas |
| Verdun | 700,000 Die, nothing changes |
| Tannenberg | Germans hold off the Russians |
| Big 4 | 4 leaders of the Allied Powers |
| Triple Alliance | Germany, Austria-Hungary, Italy |
| Triple Entente | England, France, Russia |
| Lusitania | Liner sunk by a German U-Boat |
| Zimmerman Telegram | Germany would give the SW US to Mexico |
| Reparations | payment for war damages |
| Belligerent | country at war |
| War of Attrition | one side tries to outlast the other |
| The Red Baron | Manfred von Richofthen |
| Frank Luke | The "All-American" boy- pilot |
| Eddie Rickenbacker | Highest scoring American Ace |
| Sgt. York | Medal of Honor winner-American |
