Before the War...

1619 First slaves in North America introduced at Jamestown, Virginia, and, though slaves were later sent to other British colonies in the Americas, it was in the South that they became an integral part of the plantation economy. Active slave trade by European powers continued throughout the 18th cent. But by the beginning of the 19th cent., abolitionists were already mounting their campaign to bring about its end.
1770 First ban on US slavery Quakers prohibited slaveholding (among their followers). Slavery had become an integral part of the Southern plantation economy in the US, however, and more inclusive efforts at abolition (such as during the writing of the Constitution) were stubbornly resisted by Southern states.
1798 Kentucky and Virginia Resolutions Resolutions passed (Nov., Dec.) by legislatures in the two states to oppose the Alien and Sedition Acts (1798). The ideas these resolutions put forward laid the basis for states’ rights and the nullification controversy. Written by Thomas Jefferson (Kentucky) and James Madison (Virginia), the resolutions amounted to a reply by Jeffersonian Republicans to the Federalist party interpretation of federal government powers. Essentially, Jefferson put forward the idea of a compact between the federal government and states established by the Constitution. Further, he argued the states had the power to nullify federal laws they deemed unconstitutional. The resolutions were the first statement of states’ rights doctrine.
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Henry Clay.
1820 Missouri Compromise Legislation passed (1820–21) to maintain the balance between slaveholding and free states. This compromise between the proslavery South and the abolitionists in the North was largely engineered by Rep. Henry Clay. It remained in force until replaced by the Compromise of 1850, which established the doctrine of popular sovereignty. The issue was first raised (1819) when Missouri applied for admission to the union as a slave state. With states then equally balanced (11 each) between slave and free, the Senate rejected the measure (Feb., 1819). The final compromise measure (passed Mar., 1820), however, provided for the admission of Maine as a free state, Missouri as a slave state, and banned slavery in the Louisiana Purchase territory north of Arkansas. Separate legislation requiring the Missouri constitution to guarantee rights of Negro freedmen (Mar., 1821) held up admission of Missouri until Aug., 1821. More info
1828 Nullification Controversy The states’ rights doctrine in US history holding that a state had the authority to remedy federal abuses of power by nullifying federal laws within its borders. The Kentucky and Virginia Resolutions of 1798 had argued that the union was a voluntary compact and that the federal government had no authority not specifically delegated to it by the Constitution. The issue of a protective tariff, which hurt the South, brought the conflict to a head in the 1820s, and the theory of nullification was articulated (1828) by John C. Calhoun. His home state, South Carolina, passed an Ordinance of Nullification (1832), declaring the
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federal tariffs of 1828 and 1832 inoperative within its borders. Pres. Andrew Jackson obtained a force bill allowing him to use military force to collect the tariff in Charleston but through the efforts of Henry Clay, sought a compromise tariff. South Carolina then rescinded its nullification (1833). The issue was not raised again until 1861, when South Carolina seceded from the Union, precipitating the Civil War. The Union victory in the war ultimately settled the issue by establishing federal supremacy over the states.

Slave revolt.
1831 Nat Turner Rebellion Believing he was called by God to emancipate America’s black slaves, Turner led a rebellion by 60 slaves (Aug.) that terrorized rural Virginia and cost the lives of 51 whites. Turner was captured and executed soon after the revolt broke out, but his revolt gave rise to repressive laws for controlling slaves. More info
1831 Abolitionist Newspaper Liberator founded by William Lloyd Garrison in Boston.
1833 Anti-Slavery Society founded by Garrison in Philadelphia. The society split in 1840 over various issues, including Garrison’s extremism, his opposition to involvement in political action to end slavery, and his insistence on putting women’s rights on equal footing with ending slavery.
1838 Frederick Douglass escaped slavery and after settling in the North, he became an important figure in the abolitionist movement. Frederick Douglass House, NPS
1831 Abolitionist Newspaper Liberator founded by William Lloyd Garrison in Boston.
1833 Anti-Slavery Society founded by Garrison in Philadelphia. The society split in 1840 over various issues, including Garrison’s extremism, his opposition to involvement in political action to end slavery, and his insistence on putting women’s rights on equal footing with ending slavery.
1838 Frederick Douglass escaped slavery and after settling in the North, he became an important figure in the abolitionist movement. Frederick Douglass House, NPS

A scene depicting the Underground Railroad.
c1838 Underground Railroad Secret system in the United States, organized (c1838) by abolitionists, freed slaves, philanthropists, and church leaders, to help Southern slaves escape to freedom in the North and Canada. Until slavery was ended, the organization provided a network of safe havens for escaping slaves on their way to the North. More than 40,000 slaves were said to have been aided by the Underground Railroad. Among the many opponents of slavery who were directly involved in its operation were Harriet Tubman, a former slave, and Harriet Beecher Stowe, the author of Uncle Tom’s Cabin. The system helped increase Northerners’ sympathy for the plight of slaves and also convinced Southerners that the North would never end its opposition to slavery.
U. RR Freedom Center U. RR Museum (Ohio) U. RR Museum (Philadelphia) U. RR Museum (Memphis)
Stowe Center
1840 Liberty Party formed by the anti-Garrison faction in Garrison’s Anti-Slavery Society. The
party put forward presidential candidates (1840, 1844), but failed at the polls. Meanwhile, the
struggle in Congress between pro-slavery and anti-slavery factions continued.
U. RR Freedom Center U. RR Museum (Ohio) U. RR Museum (Philadelphia) U. RR Museum (Memphis)
Stowe Center
1840 Liberty Party formed by the anti-Garrison faction in Garrison’s Anti-Slavery Society. The
party put forward presidential candidates (1840, 1844), but failed at the polls. Meanwhile, the
struggle in Congress between pro-slavery and anti-slavery factions continued.
1846 Wilmot Proviso (Aug.); measure (never passed) to prohibit slavery in territories acquired in the Mexican War. The proviso aroused bitter opposition in South and contributed to growing North-South sectionalism. 1848 Proslavery Alabama Platform advanced in opposition to the Wilmot Proviso. 1848 Free-Soil party formed by antislavery Whigs and Liberty party members; their presidential candidate, Martin Van Buren, split the New York vote (1848) and put Zachary Taylor in office. |

The 1850 "balancing act" by Congress.
1850 Compromise of 1850 (Sept. 9–20). The compromise ended heated controversy over extension of slavery into new states, raised by impending admission of California as a free state. It established doctrine of popular sovereignty, which left the decision to voters to accept or reject slaveholding in each new state. But the conflict over slavery only worsened and violence erupted in Bleeding Kansas (where “free soldiers” fought against slavery supporters) and the Harpers Ferry raid. More info
1850 Fugitive Slave Act passed. President Millard Fillmore aroused storm of protest from Northern abolitionists by trying to enforce the act, in keeping with the Compromise of 1850.
1854 Kansas-Nebraska Act (May 30) organized separate territories of Kansas and Nebraska, repealed Missouri Compromise of 1820, and left to voters the question of extending slavery into Kansas (a doctrine called Popular Sovereignty). Pro- and antislavery elements began to actively settle region. More info Historical Society Museum
1854 Republican party formed (July) at Jackson, Michigan; party formed by those opposed to the Kansas-Nebraska Act and the extension of slavery into new territories. Party Birthplace Museum
1850 Fugitive Slave Act passed. President Millard Fillmore aroused storm of protest from Northern abolitionists by trying to enforce the act, in keeping with the Compromise of 1850.
1854 Kansas-Nebraska Act (May 30) organized separate territories of Kansas and Nebraska, repealed Missouri Compromise of 1820, and left to voters the question of extending slavery into Kansas (a doctrine called Popular Sovereignty). Pro- and antislavery elements began to actively settle region. More info Historical Society Museum
1854 Republican party formed (July) at Jackson, Michigan; party formed by those opposed to the Kansas-Nebraska Act and the extension of slavery into new territories. Party Birthplace Museum

1854–59 Bleeding Kansas, the bitter struggle between pro- and antislavery settlers in Kansas prior to its admission as a state. Soon after the 1854 Kansas-Nebraska Act left to the voters the question of extending slavery into Kansas, Free-Soilers (anti-slavery “Jayhawkers”) and pro-slavery men (“Border Ruffians”) from Missouri streamed into the state. Violence between the two sides was narrowly averted in the Wakarusa War (Dec. 1855), caused by the murder of an anti-slavery man. However, there followed the sack (May 21, 1856) of Lawrence, Kansas, by pro-slavery men, the Pottawatomie Massacre (May), in which five pro-slavery settlers were murdered by John Brown and his followers, and numerous other bloody skirmishes. The violence continued until the Wyandotte Constitution was adopted (1859). Kansas was admitted as a free state (1861). The unrest contributed to the growing national crisis over the slavery issue. More info Driving tour Black Jack (Kan.) Battlefield Park
1857–61 James Buchanan (Democrat) in office as 15th president; though opposed to slavery, he sought compromise; his policies failed to prevent the secession of Southern states (1860–61), however.
1857 Dred Scott Case. US Supreme Court case (1857) involving Dred Scott, a slave taken from Missouri, a slave state, to Illinois, a free state, and then to a free territory. Scott argued that his residence in the free state and territory made him a free man. The Court decided against Scott, stating that slaves had no legal standing in court, and that the Missouri Compromise (1820) was unconstitutional. National Expansion Memorial, NPS |
1858 Lincoln-Douglas debates (Aug.–Oct.). The seven debates between Abraham Lincoln and Stephen Douglas during campaign for Senate; Lincoln won national reputation for opposing slavery as immoral; Douglas reelected to Senate.
Debates detailed, at Lincoln Home site |

John Brown.
1859 Harpers Ferry Raid Abolitionist attack (Oct. 16–18, 1859) on a federal arsenal at Harpers Ferry, in what became West Virginia, carried out by John Brown and 21 other abolitionists. Brown and his men captured the arsenal as part of a plan to start a general slave uprising in the South. Their base at Harpers Ferry was to be the nucleus of a new state in the surrounding mountains, where escaping slaves could find refuge. In fact, the raid was a failure and the arsenal was easily recaptured by combined federal troops and local militia. Brown and six of his followers were hanged. However, the incident had a profound effect on the South, which became convinced the abolitionists would stop at nothing, especially in light of captured documents that showed abolitionists had helped finance the raid. Even though his direct action was generally disapproved, Brown became a martyr of the anti-slavery cause, as attested by the marching song, John Brown’s Body. The incident was a contributing factor in the election of Abraham Lincoln, the subsequent secession of the slave states of the South and thus the American Civil War.
Harpers Ferry National Park
Harpers Ferry National Park