| Term | Definition |
| Revolution | Why did Russia withdraw from WWI? |
| Unrestricted Submarine Warfare | What German tactic upset the US the most before they entered WWI? |
| Mexico | Who did the Germans send a telegram to asking them for a military alliance? |
| Nationalism | Caused competition between nations and encouraged ethnic groups to create their own nations. |
| Archduke Francis Ferdinand | Whose assassination led to the start of WWI? |
| Lusitania | What was the name of the luxury liner sunk by German Submarines? |
| Zimmerman Telegram | What was the name of the document that suggested an alliance between Germany and Mexico? |
| Militarism | Cause that led to a naval and arms race between nations. |
| Imperialism | Cause that involved a contest among nations over who could get more colonies. |
| Alliance System | Cause that led to nations of Europe taking sides. |
| U-Boat | What was a German Submarine called? |
| Sinking of Lusitania, Zimmerman Telegram, Sinking of 4 US Merchant ships | Reasons for US entrance into WWI. |
| Militarism, Nationalism, Imperialism, Alliances, Assassination | Causes of WWI |