| A | B |
|---|
| Kaiser Wilhelm | German Emperor |
| Tsar Nicholas II | Russian Emperor |
| Woodrow Wilson | President of U.S. |
| Vladimir Lenin | Russian Communist Leader |
| Blackhand | Serbian Terrorists |
| Archduke Ferdinand | Austrian Prince--assassinated |
| Bolsheviks | communist followers of Vladimir Lenin |
| Lusitania | ship sunk by Germans |
| Zimmerman Telegram | document that promised Mexico U.S. lands |
| Russian Civil War | "reds" fight the "whites"--"reds" win |
| Treaty of Versailles | document that punished Germany |
| u-boat | German submarine |
| machine gun | dangerous new weapon; made trenches necessary |
| 1917 | year U.S. enters World War I |
| 1914 | year World War I begins |
| 1918 | year World War I ends |
