| A | B |
| German submarine warfare | U-boats attacking commercial ships causing the United States to re-think it's neutrality policy |
| Selective Service Act | law authorizing the draft for military service |
| Sedition and Espionage Acts | actions taken by the government to limit civil rights during war time. |
| Schenck v United States | upheld the government's right to limit freedom of speech during war time. |
| Wilson's 14 points | Wilson's attempt to create peace in the world following World War I. |
| Treaty of Versailles | United States did not sign because of the inclusion of the League of Nations. |
| Washington Naval Conference | An arms reduction treaty that was signed by the allied powers after WWI |
| Lusitania | British passenger cruise liner that was sunk by German U-boats, killing 128 US citizens. This was the major cause of the US involvement in WWI. |
| Kellogg-Briand Pact | An agrement making it illegal to declare war. This was good in theory but nothing in place to enforce. |
| Great Migration | Movement of Southern African Americans to Northern cities for jobs. |
| Sinking of the Lusitania | the passenger liner was torpedoed by a German U-boat resulting in 1,959 deaths including 128 Americans |
| Zimmerman Telegram | a telegram that was sent by Germany, but was intercepted by Britain, asking Mexico to join in the fight alongside Germany in WWI hoping to draw the United States into the war |