| A | B |
| Militarism | a policy of glorifying military power and keeping a standing army always prepared for war. |
| Triple Alliance | a military alliance between Germany, Austria-Hungary, and Italy in the years preceding World War I. |
| Triple Entente | a military alliance between Great Britain, France, and Russia in the years preceding World War I. |
| Kaiser Wilhelm II | Emperor of Germany |
| Schlieffen Plan | Germany's military plan at the outbreak of WWI, according to which German troops would rapidly defeat France and then move east to attack Russia. |
| Central Powers | in WWI, the nations of Germany and Austria-Hungary, along with the other nations that fought on their side. |
| Allies | in WWI, the nations of Great Britain, France, and Russia, along with the other nations that fought on their side; also, the group of nations-including Great Britain, the Soviet Union, and the U.S.-that opposed the Axis Powers in WWII. |
| Western Front | in WWI, the region of northern France where the forces of the Allies and the Central Powers battled each other. |
| Trench Warfare | a form of warfare in which opposing armies fight each other from trenches dug in the battlefield. |
| Eastern Front | in WWI, the region along the German-Russian border where Russians and Serbs battled Germans, Austrians, and Turks. |
| Unrestricted Submarine Warfare | the use of submarines to sink without warning any ship (including neutral ships and unarmed passenger liners) found in an enemy's waters. |
| Total War | a conflict in which the participating countries devote all their resources to the war effort. |
| Rationing | the limiting of the amounts of goods people can buy-often imposed by governments during wartime, when goods are in short supply. |
| Propaganda | information or material spread to advance a cause or to damage an opponent's cause. |
| Armistice | an agreement to stop fighting. |
| Fourteen Points | a series of proposals in which U.S. president Woodrow Wilson outlined a plan for achieving a lasting peace after WWI. |
| Self Determination | the freedom of a people to decide under what form of government they wish to live. |
| Treaty of Versailles | the peace treaty signed by Germany and the Allied powers after WWI. |
| League of Nations | an international association formed after WWI with the goal of keeping peace among nations. |
| Woodrow Wilson | President of the U.S. during WWI |
| George Clemenceau | France's premier and delegate at Versailles. |
| David Lloyd George | Britain's Prime Minister during the war and the meeting at Versailles. |
| reparation | money paid by a defeated nation to compensate for damage or injury during a war. |
| chancellor | the chief minister of state in many European countries. |
| impulsive | inclined to act on a sudden feeling rather than thought. |
| intelligence | secret information, especially such information about an enemy. |
| atrocity | an act of extreme cruelty or violence. |
| abdicate | to formally give up a high office or responsibility. |