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| 2396509467 | Gadsden Purchase | Completed the boundry between Mexico and the US - the US paid $10 million for it | 0 | |
| 2396511975 | Bear Flag Republic | After the California revolt against the Mexicans, the state of California became known as the Bear Flag Republic - established by John Fremont | 1 | |
| 2396515506 | Mormons | Settled in Salt Lake City - founded by John Smith | 2 | |
| 2396521255 | Manifest Destiny | 1800s belief that Americans had the "God-given right" to spread across the continent from Atlantic to Pacific | 3 | |
| 2396532616 | Treaty of Guadalupe Hidalgo | Treaty signed by the U.S. and Mexico that officially ended the Mexican-American War; Mexico had to give up much of its northern territory (California, New Mexico, Utah, Wyoming, Nevada, Arizona, Colorado) to the U.S - known as the Mexican Cession | 4 | |
| 2396538457 | Annex | To add a territory | 5 | |
| 2396539309 | Great Britain | Also claimed Oregon Territory | 6 | |
| 2396556656 | Santa Anna | Head of Mexican Gov't during Texas Revolution - signed a treaty and Texas became an independent nation called Republic of Texas | 7 | |
| 2396558881 | Oregon Trail | The most popular route that ran 2000 miles and started in Missouri | 8 | |
| 2396568496 | "Remember the Alamo" | Battle cry after the Texans were defeated as they defended the mission - a battle that lasted for 12 days and saw 200 Texans killed | 9 | |
| 2396572657 | James K. Polk | President elected in 1844 and favored expansion of the nation - famous for slogan "54-40 or fight!" | 10 |
