| A | B |
|---|
| Lusitania | British ship sunk by German U-Boat, one event that led US toward war |
| Zimmerman telegram | promise from Germany to Mexico |
| U-Boat | German Submarine |
| Trench Warfare | combat in which each side occupies a system of protective ditches |
| No man's land | area between trenches |
| mustard gas | chemical-warfare gas, blistering the skin and damaging the lungs |
| David Lloyd George | British Prime Minister |
| Woodrow Wilson | American President |
| Battle of the Somme | Heavy British Casualties |
| Kaiser Wilhelm | Leader of Germany |
| Franz Ferdinand | Assassination led to start of war |
| Black Hand | Group that assassinated Austrian Heir |
| neutrality | does not participate in a war between other nations |
| armistice | stopping hostilities |
| Allied Powers | Britain, France, Russia, US |
| Central Powers | Germany, Austria-Hungary |
| Western Front | Fighting between Germany and France |
| Eastern Front | Fighting between Russia and Central Powers |
| Versailles Treaty | Treaty that ended WWI |
| militarism | for the growth and expansion of the military to be important |
| Imperialism | taking over of other places for political or economic gain |
| Nationalism | belief ones nation is superior to any other |
| Triple Entente | alliance between Britain, Russia and France |
| Triple Alliance | Alliance signed by Germany, Austria-Hungary and Italy |
