important events between 1820 and 1860 that increased sectionalism and led to the Civil War.

  • Missouri Compromise (1820)

    Missouri Compromise (1820)

    Description: The Missouri
    Compromise allowed Missouri to enter the Union as a slave state and Maine as a free state. It also
    established the 36°30' line, banning slavery in the Louisiana Territory north of this line.
    Significance: This compromise temporarily balanced power between slave and free states, but it highlighted the deep divisions and set a precedent for future conflicts over the spread of slavery.
  • Nat Turner's Rebellion (1831)

    Nat Turner's Rebellion (1831)

    Description: Nat Turner, an enslaved preacher, led a violent slave rebellion in Virginia, killing about 60 white people. The rebellion was quickly suppressed, and Turner was executed.
    Significance: The revolt terrified white Southerners, leading to harsher slave laws and growing fear of slave uprisings. It intensified the national debate over slavery and resistance.
  • The Nullification Crisis (1832- 1833)

    The Nullification Crisis (1832- 1833)

    Description: South Carolina declared federal tariffs null and void within the state, leading to a
    confrontation with President Andrew Jackson. A compromise tariff eventually diffused the situation.
    Significance: This event showed the growing tension between state and federal authority and foreshadowed the secession crisis by asserting a state's right to reject federal laws.
  • The Gag Rule (1836-1844)

    The Gag Rule (1836-1844)

    Description: Congress passed a rule that automatically tabled (ignored) all anti-slavery petitions, preventing them from being read or discussed.
    Significance: It outraged abolitionists and increased their determination to end slavery. It also highlighted the extent to which pro-slavery forces would go to silence debate.
  • Annexation of Texas (1845)

    Annexation of Texas (1845)

    Description: Texas, an independent republic after breaking away from Mexico, was annexed by the United States and admitted as a slave state.
    Significance: This led to the Mexican-American War and raised tensions over the expansion of slavery into newly acquired territories.
  • Mexican-American War and Treaty of Guadalupe Hidalgo (1846-1848)

    Mexican-American War and Treaty of Guadalupe Hidalgo (1846-1848)

    Description: The war resulted in the
    U.S. acquiring vast territory from Mexico, including California and the Southwest.
    Significance: The new land intensified the debate over the expansion of slavery, as the North and South clashed over whether it would be free or slave territory.
  • Compromise of 1850

    Compromise of 1850

    Description: A series of laws admitting California as a free state, creating territorial governments in the rest of the Mexican Cession with popular sovereignty, and enacting a stricter Fugitive Slave Law.
    Significance: Though it delayed war, it angered both sides-especially the North, which resented the Fugitive Slave Law. It increased polarization over slavery.
  • Kansas-Nebraska Act (1854)

    Kansas-Nebraska Act (1854)

    Description: This act allowed settlers in those territories to decide for themselves whether to allow slavery, repealing the Missouri Compromise.
    Significance: It led to "Bleeding Kansas," a series of violent conflicts, and marked the collapse of compromise, showing that popular sovereignty could not resolve the slavery issue.
  • Dred Scott v. Sandford (1857)

    Dred Scott v. Sandford (1857)

    Description: The Supreme Court ruled that African Americans were not citizens and that Congress could not ban slavery in any territory.
    Significance: This decision outraged the North, strengthened the abolitionist movement, and further divided the nation by making the federal government seem pro-slavery.
  • John Brown's Raid on Harpers Ferry (1859)

    John Brown's Raid on Harpers Ferry (1859)

    Description: Abolitionist John
    Brown led a raid on a federal arsenal in an attempt to start a slave uprising. He was captured and executed.
    Significance: Brown became a martyr in the North but was viewed as a terrorist in the South. His raid convinced Southerners that abolitionists would stop at nothing, pushing the country closer to war.
  • citations

    American Battlefield Trust. (1970, June 1). https://www.battlefields.org/
    Missouri Secretary of State - IT. (n.d.). Missouri State Archivesmissouri’s Dred Scott Case, 1846-1857. Missouri Digital Heritage: Dred Scott Case, 1846-1857. https://www.sos.mo.gov/archives/resources/africanamerican/scott/scott.asp#:~:text=Missouri’s%20Dred%20Scott%20Case%2C%201846,Missouri%20Compromise%20to%20be%20unconstitutional.