| A | B |
| Nationalism | Sense of extreme pride or loyalty to a nation |
| Imperialism | Quest for colonial empires. |
| Allied Powers | France, Great Britain, Russia, Italy, United States |
| Central Powers | Germany, Austria-Hungary, Ottoman Empire (Turkey), Bulgeria |
| Triple Alliance | Military Alliance formed by Germany, Austria-Hungary and Italy before WWI |
| Trench Warfare | Opposing armies fighting from behind fixed fortifications |
| First Battle of the Marne | The German line from Ypres to Verdun |
| Treaty of Versailles | Agreement ending World War I |
| Triple Entente | Military alliance formed by Great Britain, France, and Russia before WWI |
| Lusitania | British passenger liner Torpedoed by German U-Boat |
| Sussex pledge | Germany again promises not to sink liners without warning |
| Robert Lansing | Secretary of State who encouraged trade in war materials |
| Pan-German Movement | Uniting all German-speaking peoples under one flag. |
| Pan-Slavic Movement | Bring together all Slavic peoples of central and eastern Europe |
| Archduke Ferdinand | Heir to the Austro-Hungarian Throne |
| Gavrilo Princip | 19 year old Serbian nationalist who killed Archduke Ferdinand |
| Militarism | Glorification of armed strength by a nation |
| Battle of Somme | 4 month battle in France killing and wounding 1 million people. |
| No-man's Land | Small strip of area between the trenches. |
| Alliances | Countries siding with other countries for military strength. |
| National Defense Act | Increased the number of soliers in the regular army from 90,000 to 175,000 |
| Lusitania, Sussex, Arabic | German U-Boats sunk these liners killing Americans and many others |
| War Zone | Area around Great Britain waters that German U-Boats will sink ships |
| Zimmerman Note | Proposed alliance with Mexico to gain U.S. states: New Mexico, Texas, Arizona |
| April 1917 | The date that the United States enters World War I |
| 1914 | The year that the Great War started in Europe |
| Jeannette Rankin | 1st Congresswomen voted no in America going to war |
| Selective Service Act | men ages 21-30 had to register for the draft [later changed to 18-45] |
| Woodrow Wilson | Elected President in 1916 and wrote "14 Points" and founded the League of Nations |
| Convoy | were merchant vessels, escorted by American warships |
| Sedition Act | This made it illegal to criticize the government of the military |
| Treaty of Brest-Litovsk | Russian Bolsheviks sign this with the Central Powers |
| Marshall Ferdinand Foch | The person from France agrees to join a unified Allied Army |
| Allied Victory 1918 | This was a Major offensive of America and France against Germany |