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| 7533649664 | "Fifty-four forty or fight" | Slogan adopted by mid-nineteenth century expansionists who advocated the occupation of Oregon territory, jointly held by Britain and the United States. | 0 | |
| 7533649665 | Aroostook War | Series of clashes between American and Canadian lumberjacks in the disputed territory of northern Maine, resolved when a permanent boundary was agreed upon in 1842. | 1 | |
| 7533649666 | Battle of Buena Vista | Key American victory against Mexican forces in the Mexican-American War. Elevated General Zachary Taylor to national prominence and helped secure his success in the 1848 presidential election. | 2 | |
| 7533649667 | California Bear Flag Republic | Short-lived republic, established by local American settlers who revolted against Mexico. Once news of the war with Mexico reached the Americans, they abandoned the republic in favor of joining the United States. | 3 | |
| 7533649668 | Caroline | American ship set fire by the British as it was carrying supplies across the Niagara River to Canadian insurgents, during Canada's short-lived insurrection. | 4 | |
| 7533649669 | Conscience Whigs | Northerners who opposed slavery on moral grounds. They sought to prevent the annexation of Texas as a slave state, fearing that the new slave territory would only serve to buttress the Southern "slave power." | 5 | |
| 7533649670 | Creole | American ship captured by a group of rebelling Virginia slaves. The slaves successfully sought asylum in the Bahamas, raising fears among Southern planters that the British West Indies would become a safe haven for runaway slaves. | 6 | |
| 7533649671 | Treaty of Guadalupe Hidalgo | Ended the war with Mexico. Mexico agreed to cede territory reaching northwest from Texas to Oregon in exchange for $18.25 million in cash and assumed debts. | 7 | |
| 7533649672 | Liberty Party | Antislavery party that ran candidates in the 1840 and 1844 elections before merging with the Free Soil party. Supporters sought the eventual abolition of slavery, but in the short term hoped to halt the expansion of slavery into the territories and abolish the domestic slave trade. | 8 | |
| 7533649673 | spot resolutions | Measures introduced by Illinois congressman Abraham Lincoln, questioning President James K. Polk's justification for war with Mexico. Lincoln requested that Polk clarify precisely where Mexican forces had attacked American troops. | 9 | |
| 7533649674 | Tariff of 1842 | Protective measure passed by Congressional Whigs, raising tariffs to pre-Compromise of 1833 rates. | 10 | |
| 7533649675 | Walker Tariff | Revenue-enhancing measure that lowered tariffs from 1842 levels thereby fueling trade and increasing Treasury receipts. | 11 | |
| 7533649676 | Wilmot Proviso | Amendment that sought to prohibit slavery from territories acquired from Mexico. Introduced by Pennsylvania congressman David Wilmot, the failed amendment ratcheted up tensions between North and South over the issue of slavery. | 12 | |
| 7533710624 | Webster-Ashburton Treaty | This was a compromise over the Maine boundary. America received more land in the deal but England got the Halifax-Quebec route. | 13 |
