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| 6129382190 | Gavrilo Princip | Serbian nationalist who assassinated Archduke Francis Ferdinand; member of the Black Hand | 0 | |
| 6129382191 | Archduke Franz Ferdinand | Austro-Hungarian who was assassinated; death sparked World War I | 1 | |
| 6129384376 | Woodrow Wilson | U.S. President who wanted "peace without victory" | 2 | |
| 6129384377 | David Lloyd George | Great Britain leader who was the intermediary at the Paris Peace Conference | 3 | |
| 6129388929 | Georges Clemenceau | France's leader who wanted Germany to be punished harshly | 4 | |
| 6129388957 | Vittorio Orlando | Italian leader who left the Paris Peace Conference because he did not get what he was promised | 5 | |
| 6129388958 | Ho Chi Minh | Vietnamese nationalist who wanted to speak with Wilson about the independence of Vietnam from the French; Wilson refused | 6 | |
| 6129391481 | Black Hand | Nationalist organization devoted to ending Austro-Hungarian presence in the Balkans | 7 | |
| 6129391482 | Triple Entente | Britain, France, and Russia | 8 | |
| 6129391483 | Triple Alliance | Germany, Austria-Hungary, and Italy | 9 | |
| 6129393589 | Soviet Russia | Russia after the Russian Revolution | 10 | |
| 6129393590 | Big Four/Big Three | Leaders of the Allies who met at the Paris Peace Conference; Woodrow Wilson, David Lloyd George, Georges Clemenceau, and Vittorio Orlando | 11 | |
| 6129395711 | Soviet Union | Soviet Russia's later name | 12 | |
| 6129395712 | League of Nations | Suggested by Woodrow Wilson; U.S. did not join | 13 | |
| 6129395713 | Weimar Government | German government that had agreed to the terms of the Treaty of Versailles | 14 | |
| 6129397502 | Pan-Arabism | Ideology that called for the unification of all lands in North Africa and Southwest Asia | 15 | |
| 6129397503 | Zionists | Supported a Jewish homeland | 16 | |
| 6129397504 | May Fourth Movement | Demonstrated Chinese nationalism; resentment for the West because they tried to give Japan Germany's land in China; led them to start to turn to Communism | 17 | |
| 6129399684 | The Great War | Name for World War I because no previous war had been so huge | 18 | |
| 6129399685 | Militarism | Aggressive military preparedness; celebrates war and the armed forces | 19 | |
| 6129399686 | Secret Alliances | Groups whose members secretly agree to protect and help one another when attacked | 20 | |
| 6129403024 | Central Powers | Germany, Austria-Hungary, and the Ottoman Empire | 21 | |
| 6129405767 | Self-Determination | The idea that peoples of the same ethnicity, language, culture, and political ideals should be united and should have the right to form and independent nation state | 22 | |
| 6129405768 | Stalemate | First four-years of the war where neither side could defeat the other | 23 | |
| 6129405769 | Lusitania | American ocean liner that Germany sunk | 24 | |
| 6129408022 | Zimmerman Telegram | Message from Germany to Mexico that said if Mexico helped them, they would help Mexico reclaim their old land from America; caused America to join the war | 25 | |
| 6129408023 | Treaty of Brest-Litovsk | Ended Russia's involvement in the war | 26 | |
| 6129410233 | Total War | Meant that a nation's domestic population was comitted to winning the war | 27 | |
| 6129410234 | Propaganda | Communication meant to influence the attitudes and opinions of a commnity around a particular subject by spreading inaccurate or slanted information | 28 | |
| 6129410235 | Global War | War that occurs around the world | 29 | |
| 6129412199 | Gallipoli | Area in the Ottoman Empire where many Allies including Canada, ANZAC, India, Africa, China, Vietnam, and Arabs fought the Ottomans | 30 | |
| 6129412200 | Gurkha | Soldiers from India | 31 | |
| 6129412201 | ANZAC | Special corps of troops from Australia and New Zealand | 32 | |
| 6129414111 | Armistice Day | Day the Central Powers surrendered to the Allies | 33 | |
| 6129414112 | Paris Peace Conference | Conference to discuss the outcomes of the war | 34 | |
| 6129415647 | Fourteen Points | Document by Woodrow Wilson that outlined his principles | 35 | |
| 6129415648 | Treaty of Versailles | Peace treaty with Germany | 36 | |
| 6129415649 | Reparations | Payment of money for wrongs committed | 37 | |
| 6129417966 | Decolonization | Letting colonies become independent | 38 | |
| 6129417967 | Mandate System | The League of Nations ruled the colonies and territories of the Central Powers | 39 | |
| 6129417968 | Balfour Declaration | Issued by the British government that state Palestine should become a permanent home for the Jews of Europe | 40 | |
| 6129419615 | Poison Gas | One of the most insidious weapons of the new style of warfare; soldiers were soon equipped with gas masks; led to permanent lung damage; outlawed after the war | 41 | |
| 6129419616 | Machine Guns | Increased deadly impact of warfare; made it difficult for either side in a battle to gain new territory | 42 | |
| 6129419630 | Tanks | Allowed armies to move across vast areas of difficult terrain | 43 | |
| 6129421838 | Submarines | Caused havoc on the shipping lanes of the Atlantic Ocean | 44 | |
| 6129421839 | Airplanes | Used only for observation of enemy lines | 45 | |
| 6129421840 | Trench Warfare | Trenches dug where soldiers lived and fought; caused problems to health and caused little progress to be made | 46 | |
| 6129423432 | U-Boat | Type of submarine Germany used | 47 | |
| 6129423433 | Influenza Epidemic | Pandemic that spread after war from soldiers returning home | 48 | |
| 6129423434 | Pandemic | Disease prevalent over a large area or the entire world | 49 | |
| 6129425262 | Soviets | Groups of workers or soldiers led by socialists | 50 | |
| 6129425263 | Bolsheviks | Party of radical socialists that seized power in Russia | 51 | |
| 6129425264 | Lost Generation | Those suffering from the shock of the war | 52 | |
| 6129427360 | Genocide | Attempted killing of a group of people based on their race, religion, or ethnicity | 53 | |
| 6129427361 | Armenians | Christians who were killed in Russia | 54 |
