| A | B |
| Monroe Doctrine | policy that ended European colonization in the western hemisphere |
| Texas Revolution | people of Texas went to war with Mexico to become independent |
| Annexation of Texas | when the U.S. added Texas as a state |
| Treaty of Oregon | divided Oregon and gave U.S. sole control of the southern half |
| 54 40 or fight! | Polk's slogan that he wanted sole control of all the Oregon Territory for the U.S. |
| Mexican War | war between U.S. and Mexico over a border dispute |
| Treaty of Guadalupe Hidalgo | ceded a large portion of Mexican land in the SW to the U.S. |
| Mexican Cession | land in the SW that became U.S. territory at the end of the Mexican War |