| A | B |
| militarism | a system of government in which the military controls and makes political decisions |
| nationalism | extreme pride in one’s country often resulting in intolerance of other individuals or countries |
| alliance | formal agreement among nation to cooperate and provide for their mutual defense |
| disarmament | the reduction of armed troops and weapons |
| reparations | payment for war damages |
| dog fight | aerial combat |
| interrupter gear | a device that timed the machine gun with the propeller |
| trench warfare | fighting in trenches |
| no man's land | the space between the trenches where soldiers were vulnerable to fire |
| mustard gas | used as a weapon - outlawed after war |
| Allied Powers | US, France, Great Britain, Italy, Russia |
| Central Powers | Germany, Austria Hungary |
| Treaty of Versailles | attended only by victors, Allied powers |