| A | B |
|---|
| militarism | an increase in the importance of the military of a country |
| Archduke Francis Ferdinand | Heir apparent to the Austrian emperor, the assassination of him and his wife led to the beginning of World War I. |
| mobilize | to prepare for war |
| Central Powers | the coalition of nations in World War I that included the German, Austrio-Hungary, and Ottoman empires |
| Allied Powers | a group of nations that allied to fight the Central Powers in World War I, and those countries in opposition to the Axis Powers in World War II |
| trench warfare | a new kind of warfare in World War I that involved troops digging and fighting from deep trenches |
| stalemate | a situation in which neither side can win a victory |
| U-boats | German submarines or "untersee boats" |
| Lusitania | a passenger ship bombed by Germany |
| Zimmerman Note | a telgram from Germany to Mexico offering Mexico a return of territory in exchange for declaring war on the United States |
| Selective Service Act | a law that allowed the president to draft soldiers in times of war |
| Liberty bonds | loans to the government that aided its ability to prepare for World War I |
| National War Labor Board | a government agency organized to help settle disputes between workers and employers in war industries |
| American Expeditionary Force | the U.S. military forces sent to Europe during World War I and led by General John J. Pershing |
| Communists | people who believe in communism, or the political system in which all resources are shared equally |
| armistice | a truce or cease-fire agreement between warring nations |
| League of Nations | a coalition of governments designed to find peaceful solutions to disagreements, proposed by Woodrow Wilson |
| reparations | financial payments by the loser of a war |
| Treaty of Versailles | brought an end to World War I, but was never ratified by the United States |
| Henry Cabot Lodge | A U.S. senator from Massachusetts, he was opposed to President Wilson's plan for the League of Nations, fearing it would draw the United States into wars not in the nation's interest |
