📜

AP US History: Expansion and Civil War

May 7, 2025

AP US History Unit 5: 1844-1877

Overview

  • Covers the time period from 1844 to 1877.
  • Significant portion of the AP exam.
  • Unit focuses on westward expansion, tensions leading to the Civil War, the Civil War, and Reconstruction.

Manifest Destiny and Westward Expansion

  • Manifest Destiny: Belief that Americans were destined to expand across the continent.
    • Expansion motivated by opportunities: fertile land, mining (Gold Rush), and religious freedom (e.g., Mormons in Utah).
  • Homestead Act and Pacific Railroad Act: Encouraged westward settlement by offering land and building railroads.
  • Transnational interest: Opened trade with Asia through treaties with China and Japan.

Tensions Leading to Civil War

  • James K. Polk's Presidency: Focused on westward expansion.
    • Negotiated Oregon territory with Britain.
    • Mexican-American War over Texas boundaries, resulting in Treaty of Guadalupe Hidalgo.
  • Mexican Cession: Gained land raised slavery disputes.
    • Wilmot Proviso: Proposal to ban slavery in new territories failed, increasing tensions.
  • Compromise of 1850:
    • California as a free state.
    • Territories decide on slavery via popular sovereignty.
    • Stricter Fugitive Slave Act angered Northerners.

Immigration and Abolitionist Movement

  • Immigration: Influx of Irish and German immigrants in northern cities.
    • Built ethnic communities, faced nativist opposition.
  • Abolitionists:
    • Influential figures: Frederick Douglass, Harriet Beecher Stowe (Uncle Tom's Cabin), Harriet Tubman.
    • Exposed slavery's horrors and supported the Underground Railroad.

Final Attempts to Prevent War

  • Kansas-Nebraska Act: Allowed territories to decide on slavery, leading to Bleeding Kansas.
  • Formation of Republican Party: In response to slavery's expansion.
  • Dred Scott Decision: Ruled slaves were not citizens, increasing tensions.

The Civil War

  • Presidential Election of 1860: Lincoln elected, prompting Southern secession.
    • South Carolina first to secede, forming the Confederacy led by Jefferson Davis.
  • War Strategies:
    • Confederate: Defensive strategy, hope for European support.
    • Union: Anaconda Plan to blockade and divide the South.
  • Turning Points:
    • Battle of Gettysburg and Siege of Vicksburg shifted momentum to the Union.
    • Emancipation Proclamation reframed the war as a fight against slavery.

Reconstruction Era

  • Lincoln's 10% Plan: Lenient readmission of Southern states.
  • Radical Reconstruction: Harsher measures to protect black rights.
  • Key Amendments:
    • 13th Amendment: Abolished slavery.
    • 14th Amendment: Citizenship and equal protection.
    • 15th Amendment: Voting rights for black men.
  • Challenges:
    • Black Codes and Sharecropping: Limited freedoms of African-Americans.
    • Ku Klux Klan: Intimidation and violence against black voters.
  • End of Reconstruction: Compromise of 1877 ended federal intervention, leading to Jim Crow laws.

Conclusion

  • Reconstruction failed to secure long-term civil rights for African-Americans.
  • The legal foundation for future civil rights movements was established through the 14th and 15th Amendments.
  • Unit 5 concludes with the end of Reconstruction and the beginning of Jim Crow laws.