| A | B |
| Selective Service Act | In preparation for war all men between 18-25 must be registered for the draft |
| War Industries Board | created to prepare the country for war |
| War Bonds | debt securities issued by a government for the purpose of financing military operations during times of war |
| Espionage Act | prohibited any attempt to interfere with military operations, to support America's enemies during wartime, to promote insubordination in the military, or to interfere with military recruitment |
| Sedition Act | forbade the use of "disloyal, profane, scurrilous, or abusive language" about the United States government |
| Committee of Public Information | also known as the CPI or the Creel Committee, was an independent agency of the government of the United States created to influence U.S. public opinion regarding American participation in World War I |
| Lusitania | British luxury ship sunk by Germans, Americans on board where killed |
| U-Boat | Germany submarine |
| Nationalism | love of country |
| Imperialism | more powerful nation takes over smaller, weaker nation |
| Militarism | building up military |
| Allies | Britain, France, Italy, Russia and U.S. |
| Central Powers | Austria-Hungary, Germany, Bulgaria, Ottoman Empire |
| Trench Warfare | warfare in which armies dig in in order to slow war down |
| Zimmerman Note | telegram from Germany to Mexico asking Mexico to declare war on U.S. |
| Propaganda | information designed to influence and persuade |
| Mass Production | use of assembly lines to produce large volumes of a product |
| League of Nations | was an intergovernmental organization founded as a result of the Treaty of Versailles in 1919–1920, and the precursor to the United Nations |
| Fourteen Points | Woodrow Wilson's plan for peace |
| Reparations | war debts, repayments for war damages |