Chapter 13 Vocab List

Manifest Destiny

Coined by journalist John O'Sullivan in 1845, this was the widespread 19th-century belief that the United States was divinely ordained by God to expand across the North American continent from coast to coast to spread capitalism and democratic institutions. It served as the primary ideological justification for the annexation of Texas, the Oregon boundary dispute, the displacement of Native Americans, and the Mexican-American War, while continuously reigniting national debates over the territorial expansion of slavery.

James Polk

_____________ was the 11th U.S. President (1845–1849), a Jacksonian Democrat and hardline expansionist known as the ultimate "Manifest Destiny" president. He campaigned on a single-term promise and successfully fulfilled all four of his major platform goals: lowering the tariff, reestablishing the Independent Treasury, settling the Oregon boundary dispute with Great Britain, and acquiring California and New Mexico through the Mexican-American War.

Sam Houston

A soldier, statesman, and key military leader of the Texas Revolution who led the surprise attack against Santa Anna's Mexican army at the Battle of San Jacinto in 1836. Houston served as the first and third President of the Republic of Texas and later represented Texas as a U.S. Senator and Governor, consistently advocating for annexation into the United States and firmly opposing Southern secession in 1861.

San Jacinto (Battle of San Jacinto)

The decisive 18-minute surprise attack fought in April 1836 where Sam Houston's Texian forces routed the Mexican army and captured dictator Antonio López de Santa Anna while his troops rested. Houston forced Santa Anna to sign the Treaties of Velasco, ordering all Mexican troops to retreat south of the Rio Grande and granting de facto independence to Texas, establishing the Lone Star Republic.

Slidell (Slidell Mission)

A secret 1845 diplomatic mission dispatched by President James K. Polk, who sent political ___________ to Mexico City with an offer to pay up to $30 million for California and New Mexico and settle the Texas boundary at the Rio Grande. The Mexican government’s refusal to receive Slidell was used by Polk as a political pretext to send U.S. troops into disputed territory to provoke a military incident and start the Mexican-American War.

Rio Grande

The river claimed by the United States as the official southern border of Texas following its 1845 annexation. Mexico insisted that the true boundary was the Nueces River, 150 miles further north, creating a contested strip of disputed land where President Polk dispatched U.S. troops under General Zachary Taylor to draw Mexican fire and ignite the Mexican-American War.

Bear Flag (Bear Flag Revolt)

A short-lived June 1846 uprising by American settlers in Sonoma, California, who rebelled against Mexican rule and declared California an independent republic, flying a flag featuring a bear and a star. The revolt was quickly absorbed into the U.S. military conquest of California during the Mexican-American War.

Guadalupe Hidalgo (Treaty of Guadalupe Hidalgo)

The 1848 peace treaty negotiated by Nicholas Trist that officially ended the Mexican-American War. Mexico recognized the Rio Grande as the Texas border and ceded California, Nevada, Utah, and parts of Arizona, New Mexico, Colorado, and Wyoming (the Mexican Cession) to the U.S. in exchange for $15 million and the assumption of boundary claims.

Wilmot Proviso

A controversial 1846 amendment proposed by Pennsylvania Democratic Congressman __________ stipulating that slavery be completely banned in any territory acquired from Mexico. Though it passed the House multiple times, it was repeatedly defeated in the Senate, completely shattering traditional national party lines along sectional lines and giving birth to the Free Soil movement.

Missouri Compromise

The 1820 landmark agreement engineered by Henry Clay that admitted Missouri as a slave state and Maine as a free state, while establishing a geographic line at 36°30' across the Louisiana Purchase banning slavery north of the border. It maintained sectional balance in the U.S. Senate for 34 years until its explicit repeal by the Kansas-Nebraska Act in 1854.

Free Soil (Free Soil Party / Movement)

A prominent political party and ideological movement founded in 1848 under the slogan "Free Soil, Free Speech, Free Labor, and Free Men." Composed of anti-slavery Whigs, Democrats, and Liberty Party members, they campaigned strictly to keep western territories free of slavery so that poor white workingmen would not have to compete against unfree slave labor.

Popular Sovereignty

A political compromise doctrine championed by Senator Stephen A. Douglas and Lewis Cass proposing that the actual white settlers living within a western territory should vote to decide whether to allow or forbid slavery. Intended to remove the explosive issue of slavery from Congress, it ultimately caused severe violent conflict when pro- and anti-slavery groups flooded into Kansas to control elections.

Compromise of 1850

A sweeping package of five separate legislative bills engineered by Henry Clay and Stephen Douglas that temporarily defused the territorial crisis: California entered as a free state, popular sovereignty was established in Utah and New Mexico, the D.C. slave trade was banned, Texas settled its border for debt relief, and a strict Fugitive Slave Act was enacted.

Fugitive Slave Law of 1850

The most explosive component of the Compromise of 1850, which legally required Northern citizens to assist in capturing runaway slaves and denied accused runaways jury trials or the right to testify. The law outraged Northern public opinion, brought the harsh reality of slavery into free states, and led Northern legislatures to pass retaliatory Personal Liberty Laws.

Personal Liberty Laws

A series of state statutes passed by Northern state legislatures in response to the Fugitive Slave Act of 1850 to protect escaped slaves and free Black citizens. These laws forbade state officials from assisting federal slave catchers, prohibited the use of local jails for housing runaways, and guaranteed jury trials for accused fugitives, directly challenging federal authority.

Underground Railroad

An informal, secret network of abolitionists, safe houses, and covert escape routes organized by free Black Americans, white abolitionists (such as Harriet Tubman), and religious groups like the Quakers. It assisted thousands of enslaved people fleeing the South in escaping to Northern free states or Canada, infuriating Southern slaveholders who demanded strict federal enforcement of fugitive slave laws.

Young America

A popular political and cultural movement within the Democratic Party during the early 1850s that promoted international democratic revolutions, technological modernization, commercial growth, and territorial expansion across the Pacific and Caribbean. Southern leaders frequently used the movement's expansionist energy to attempt to acquire new potential slave territories in Latin America (such as Cuba).

Kansas Nebraska Act

A historic 1854 law authored by Stephen Douglas that organized territories to enable a northern transcontinental railroad route. To secure Southern votes, the law repealed the Missouri Compromise's 36°30' line and applied popular sovereignty, directly causing "Bleeding Kansas" and giving rise to the Republican Party.

Lecompton (Lecompton Constitution)

A fraudulently drafted pro-slavery constitution created in 1857 by pro-slavery delegates in Kansas that was designed to guarantee slavery in the territory regardless of public vote. President James Buchanan endorsed it, but Stephen Douglas broke with the administration to oppose it in Congress, deeply fracturing the Democratic Party.

John Brown

A radical, deeply religious abolitionist who believed he was an instrument of God sent to destroy human slavery through armed insurrection. His violent actions during the Pottawatomie Massacre in Kansas and his 1859 raid on the federal arsenal at Harpers Ferry polarized the nation, turning him into a heroic martyr in the North and a terrifying terrorist in the South.

James Buchanan

The 15th U.S. President (1857–1861), a Democratic "Doughface" whose administration heavily favored Southern pro-slavery interests. Widely criticized by historians, ________ supported the pro-slavery Lecompton Constitution in Kansas, endorsed the Dred Scott decision, and failed to take any decisive executive action when Southern states seceded from the Union in 1860.

Dred Scott (Dred Scott v. Sandford)

A landmark 1857 Supreme Court ruling by Chief Justice Roger B. Taney declaring that African Americans were not citizens and could not sue in court, that enslaved people were property protected by the 5th Amendment, and that Congress had no constitutional power to ban slavery in any territory, rendering the Missouri Compromise unconstitutional.

Garrison and Douglas (William Lloyd Garrison & Frederick Douglass)

the most prominent anti-slavery leaders of the antebellum era who famously split over strategy: Garrison was a radical white abolitionist who viewed the U.S. Constitution as an unholy pro-slavery document and demanded immediate moral persuasion, while Douglass was a self-emancipated Black leader who embraced political action and argued that the Constitution was inherently anti-slavery.

Two-Nation Idea (Sectional Divergence)

The conceptual framework describing the antebellum United States as having evolved into two entirely distinct, unassimilable civilizations: an industrial, urbanized North powered by free wage labor and high immigration, and an agrarian South anchored by the slave plantation economy, cotton production, and racial caste systems, making eventual military conflict inevitable.