| A | B |
| Czar | leader of Russia in WWI |
| Bolshevik Revolution | Communists take over in Russia, they quit WWI |
| Kaiser | leader of Germany in WWI, abdicated from German throne at the end of WWI |
| Trench Warfare | type of warfare in WWI |
| Abdicate | withdraw |
| Reparations | payments for losses suffered during the war |
| Epidemic | flu in Europe killed many after WWI ended |
| Self-determination | the right of a country to set up it's own government |
| Propaganda | words and/or pictures designed to get people to think a certain way |
| Stalemate | when no side is winning |
| Allied Powers | Britain, France, Russia and later the United States |
| Central Powers | Germany, Austria-Hungary |
| Neutrality | not taking sides |
| Unrestricted Submarine Warfare | used by Germany to stop Allied Powers trade, major factor for U.S. entry |
| Lusitania | British passenger ship sunk by German sub killing 1200, 128 were U.S. citizens |
| American Expeditionary Force | name for U.S. troops, led by John "Black Jack" Pershing |
| Armistice | cease fire |
| Treaty of Versailles | Ends WWI |
| Selective Service Act | required men between 21-30 to register for the draft |
| Fourteen Points | Woodrow Wilson's plan for peace after WWI |
| Event that "sparked" WWI | assassination of Archduke Franz Ferdnand |
| April 6, 1917 | When U.S. joined the allies |
| War Ace | pilot who shot down over 5 planes |
| Pacifists | people who want peace |
| Militarism | countries build up their militaries |
| Big Bertha | German long range gun that shelled paris from 75 miles away |
| Imperialism | get colonies (build Empires) |
| Dog Tag | metal identification disk worn around the neck |
| Doughboy, Yank, Trooper, Sammy | terms for American soldiers |
| Tommy or Limey | term for British soldier |
| Dreadnought | term for a heavy battleship |
| Dud | term for a shell that didn't explode |
| Dumdum | soft bullet that expands on contact |
| Flame Throwers | were first used in WWI |
| Gas Warfare | chlorine, phosgene, tear gas, sneezing gas, vomiting gas, mustard gas |
| Hand Grenades | small bombs thrown at the enemy |
| Woodrow Wilson | President of the US during WWI |
| Zimmerman Telegram | Germany asked Mexico to become an ally and attack the U.S. |
| Nationalism | strong pride in your nation (builds loyalty) |
| Mobilization | preparing for war |
| New Weapons | machine guns, airplanes, grenades |
| International Law | rules that countries are supposed to follow |
| Blockade | stop ships from trading |
| U-boats | German submarines |
| Sussex Pledge | Germany agreed to warn passenger ships before sinking them (no more USW) |
| Herbert Hoover | Coordinated the food relief effort in Belgium |
| Rationing | limit the consumption of food and resources |
| Convoy | ships travel together for safety |
| John J. Pershing "Black Jack" | leader of U.S. Expeditionary Force |
| Influenza | post-war epidemic kills millions in Europe |
| League of Nations | one of Wilson's Fourteen Points, a place for countries to settle disputes |