| A | B |
| Militarism | Keeping an army prepared for war |
| Triple Alliance | Germany Austria-Hungary Italy |
| Triple Entente | Great Britain France Russia |
| Central Powers | Germany Austria-Hungary Bulgaria Ottoman Empire. |
| Allies | Great Britain Russia Italy US France Japan |
| Western Front | Deadlocked region in northern France |
| Schlieffen Plan | A strategy to race west to France |
| Trench Warfare | Soldiers fight each other from trenches dug in the battlefield |
| Eastern Front | A stretch of battlefield along the German and Russia border. |
| Unrestricted submarine warfare | Germans would sink any ship in British waters without warning |
| Total War | Countries devoted all of their resources to the war efforts |
| Rationing | Buying of small amounts of supplies that were also needed for war efforts |
| Propaganda | One-sided information designed to persuade-keep up morale and support the war |
| Armistice | An agreement to stop fighting |
| Self-determination | Allowing people to decide for themselves under what government they wish to live |