| A | B |
|---|
| The combination of Americans' belief in their own exceptionalism and westward movement | Proponents of Manifest Destiny |
| The Caroline Incident and the Aroostook War | The U.S. and Britain nearly went to war over Canada |
| Webster-Ashburton Treaty of 1842 | The U.S. and Britain resolved the Aroostook War and agreed to jointly supress the African slave trade |
| The Spanish and then Mexicans need to populate Texas | Stephen F. Austin and other empresarios were invited to colonize Texas |
| The flood of Anglos to Texas between 1821 and 1835 | The Mexicans were angry because the Texians brought their slaves and refused to convert to Catholocism |
| The Texas Revoution | Anglo settlers in Texas won their independence from Mexico and established their own nation |
| Fears annexing Texas would anger Mexico and norhtern abolitionists | Andrew Jacksn and Martin Van Buren refused to annex Texas despite their desire to do so |
| Tyler seeing the 1844 Elections as a mandate and desire to undercut his rival: James K. Polk | Texas was annexed by a joint resolution |
| James K .Polk campaigning on a platform championing Manifest Destiny and Clay waffles on the issue of Texas | Polk won a surprising victory in 1844 |
| The annexation of Texas, Polk's failed attempt to purchase California, and a border dispute with Mexico | The Mexican War |
| Fears the Mexican War was part of a Southern slaveholders' conspriacy to advance slavery | Nortehrn opposition to the Mexican War |
| The Treaty of Guadalupe Hidalgo (1848) | The Mexican War ended and the U.S. obtained the present-day Southwest for $15 million |
| The Wilmot Proviso (1846) | Demonstrated the issue of slavery in any gains from Mexico would polarize the North and South |
