| A | B |
| manifest destiny | belief that United States would expand across the continent |
| James K. Polk | 11th president of the U.S. |
| Zachary Taylor | U.S. General in the war with Mexico |
| Bear Flag Revolt | rebellion by Americans against Mexican rule in California |
| Winfield Scott | U.S. General in the war with Mexico |
| Treaty of Guadalupe Hidalgo | treaty ending the war with Mexico |
| Mexican Cession | vast region given up by Mexico to the U.S. after the war with Mexico |
| forty-niner | person who went to California to find gold, starting in 1849 |
| Californio | a california settler of Spanish or Mexican descent |
| Mariano Vallejo | a Californio and a member of one of the oldest Spanish families in America |
| John Sutter | a California settler on whose land gold was found |
| James Marshall | a carpenter who found gold at Sutter's Mill |
| Californio gold rush | when large numbers of people moved to California to find gold starting in 1849 |