| A | B |
| WWI | "The Great War" "The War to End All Wars" |
| Total War | Complete mobilization of resources and people in war effort |
| Conscription | Draft |
| Triple Alliance | Germany, Austria-Hungary, Italy |
| Triple Entente | France, England, Russia |
| Satellites | Smaller nations became allies |
| Brinkmanship | Threatening to go to war to achieve goals |
| Gavrilo Princip | Assassin(Serbian) |
| Black Hand | Serbian terrorist organization |
| "Blank check" | Rely on German full support |
| "No Man's Land" | Land between 2 opposite sides |
| "Over the Top" | Order to charge enemy |
| War of Attrition | Wear down other side - Constant attacks |
| Battle of Somme | First battle that tanks were used |
| Battle of Ypres | "Race to the Sea" |
| U-Boats | "Underwater" |
| Lusitania | English passenger liner |
| Propaganda | Spreading of ideas or rumors to harm opposition |
| Zimmerman Affair | German Foreign Minister sent secret telegram to Mexico for an alliance against the U.S |
| Vladimir Lenin | Communist Leader |
| Treaty of Brest Litvosk | Russian peace treaty with Germany |
| John "Black Jack" Pershing | American Expeditionary Force Commander |
| "Devil Dogs" | German nickname for U.S. Marines |
| Innovations of Warfare | 1st Industrialized War |
| Zeppelins | Giant airships |
| Airplane | "Flaming Coffins" |
| Baron Von Richthofen | Red Baron (Germany's top pilot) |
| Eddie Rickenbacker | American Ace |
| Big Four | Georges Clemenceau, David Lloyd George, Woodrow Wilson, Vottorio Orlando |
| 14 Points | Woodrow Wilson's peace proposal |
| League of Nations | General Association of Nations |
| Treaty of Versailles | Ended the war on June 28th, 1919 |