| A | B |
| Alliance | An agreement between two or more nations to cooperate and/or come to another’s defense. |
| Armistice | A Truce between two or more countries or powers to stop fighting. Armistice Day for WWI was on November 11, 1918. |
| Triple Entente | An Alliance between Russia, France, and Great Britain. |
| Stalemate | A draw or tie. This occurred because of Trench Warfare. |
| Central Powers/ Triple Alliance | Central Powers/ Triple Alliance, An Alliance between Germany, the Austrian-Hungary Empire and the Ottoman Empire. |
| Militarism | The belief that a government should keep a strong military and make sure that it is ready to be used aggressively and able to defend. |
| Neutral | To not be for or against anyone |
| League of Nations | An organization setup to achieve world peace. It was weak because it did not have authority or influence and ultimately failed. |
| U-Boats | German submarines. |
| Draft | An order taken by a government to enlist soldiers into the war. |
| Lusitania | A British ship carrying some U.S. civilians that was destroyed by a German |
| Self-Determination | The idea that groups of people are able to choose and setup their own type of government. |
| Fourteen Points | A list that Woodrow Wilson made carving out a list of peace negotiations. |
| Franz Ferdinand | An Archduke from Austria that was assassinated and triggered World War I |
| Reparations | The damages that are to be paid back by the losing party to the offended party |
| Western Front | The area where most fighting was held during World War one. The area was in between France and Germany. |
| Trench Warfare | Used in the majority of World War I, soldier dug long lines of trenches and stayed there so causing stalemate. |