| Term | Definition |
| nationalism | devotion to one's nation |
| annex | to join or attach, as in the joining of a new territory to an existing country |
| spheres of influence | area of economic and political control exerted by one nation over another nation or other naions |
| open door policy | american approach to China around 1900, favoring open trade relations between China and other nations |
| Roosevelt Corollary | president theodore roosevelt's 1904 extension of the monroe doctrine in which he asserted the right of the US to intervene in the affairs of Latin American nations |
| dollar diplomacy | president taft's policy of encouraging American investment in foreign economies |
| central powers | in WWI, Germany and Austria-Hungary |
| allies | in WWi, Russia, france, serbia, and great britain in WWII, the alliance of Great Britain, the US, the Soviet Union, and other nations |
| stalemate | situation in which neither side in a conflict is able to gain the advantage |
| propaganda | information intended to sway public opinion |
| u boat | a german submarine |
| sussex pledge | pledge by the german government in 1916 that its submarines would warn ships before attacking |
| zimmerman note | a telegram sent by germany's foreign secretary in 1917 to mexican officials proposing on alliance with mexico and promising the united states territory if mexico declared war on the United States |
| selective service | law passed in 1917 authorizing a draft of young men for military service in WWI |
| armistice | a cease-fire or truce |
| genocide | organized killing of an entire people |
| liberty bonds | special war bond sold by the government to supoprt the allied cause during WWI |
| price controls | system of pricing determined by the government |
| rationing | distribution of goods to consumer in a fixed amount |
| daylight savings | turning clocks ahead by one hour for summer |
| sedition | speech or action that encourages rebellion |
| fourteen points | president wilson's proposal in 1918 for a postwar European peace |
| league of nations | internaional organization formed after WWI that aimed to ensure the security and peace for all its members |
| Versailles treaty | 1919 treaty that ended WWI |