| A | B |
| Germany naval rules changed | use of U-boats |
| proposed alliance with Mexico | Germany's Zimmerman note |
| Liberty Bonds | US sold to finance war |
| Pres Willson proposed peace | Fourteen Points |
| power to make own decisions | Austria-Hungary sought self-determination |
| League of Nations | Wilson hoped for security & peace |
| Britain wanted payment for war damage | reparation for economic injuries |
| signed to end WWI | Versailles Treaty |
| convoy system purpose | troop transport across Atlantic |
| federal gov't economic role during war | regulate production of war goods |
| trigger incident of WWI | assination of Austro-Hungarian heir |
| underlying cause WWI | European defense alliances |