Causes of Westward Expansion
Manifest Destiny: belief that U.S. was destined to expand across North America.
Texas Annexation (1845): sparked tensions with Mexico.
Oregon Trail: settlers moved westward; "54°40' or Fight!" over Oregon border.
California Gold Rush (1848): influx of settlers; intensified sectional debates over slavery in new territories.
Mexican-American War (1846–1848)
Causes: U.S. annexation of Texas, border disputes.
Events: U.S. forces occupied Mexican territories.
Treaty of Guadalupe Hidalgo: U.S. gained Mexican Cession (California, Arizona, etc.).
Consequences: exacerbated sectional tensions over slavery in new territories.
Wilmot Proviso (1846)
Proposal to ban slavery in Mexican Cession territories.
Failed to pass; highlighted growing sectional divide.
Compromise of 1850
Admitted California as a free state.
Fugitive Slave Act enforced stricter rules.
Popular sovereignty in Utah and New Mexico.
Slave trade banned in D.C., but slavery remained legal.
Kansas-Nebraska Act (1854)
Repealed Missouri Compromise (1820).
Established popular sovereignty for Kansas and Nebraska.
Led to "Bleeding Kansas" as pro- and anti-slavery forces clashed.
Dred Scott Decision (1857)
Supreme Court ruled African Americans were not citizens.
Declared Missouri Compromise unconstitutional.
Inflamed tensions between North and South.
Rise of the Republican Party
Formed in response to Kansas-Nebraska Act.
Platform: opposed expansion of slavery.
Abraham Lincoln emerged as a key leader.
Election of 1860
Abraham Lincoln won without Southern support.
Prompted Southern states to secede, beginning with South Carolina.
Led to the formation of the Confederate States of America.
Civil War (1861–1865) Causes
Slavery and sectionalism.
States' rights vs. federal authority.
Economic differences: industrial North vs. agrarian South.
Election of Abraham Lincoln as a catalyst.
Major Battles of the Civil War
Fort Sumter (1861): first shots fired.
Antietam (1862): bloodiest single-day battle; led to Emancipation Proclamation.
Gettysburg (1863): turning point; Union victory.
Appomattox Court House (1865): Lee surrendered to Grant.
Emancipation Proclamation (1863)
Declared freedom for slaves in Confederate states.
Did not apply to border states.
Shifted war aims to include ending slavery.
Reconstruction (1865–1877) Overview
Presidential Reconstruction: lenient policies under Lincoln and Johnson.
Radical Reconstruction: stricter policies; included military occupation of the South.
Aimed to rebuild the South and integrate freedmen.
13th, 14th, and 15th Amendments
13th: Abolished slavery.
14th: Granted citizenship and equal protection under the law.
15th: Voting rights for African American men.
Freedmen's Bureau (1865)
Provided education, food, and support for former slaves and poor whites.
Faced opposition from Southern whites
Black Codes and Sharecropping
Black Codes: laws restricting African Americans' freedoms.
Sharecropping: economic system trapping freedmen in cycles of debt and poverty.
Ku Klux Klan
White supremacist group that terrorized African Americans and Republicans.
Aimed to suppress African American voting and maintain white dominance.
End of Reconstruction (1877)
Compromise of 1877: Rutherford B. Hayes became president; federal troops withdrawn from South.
Led to rise of Jim Crow laws and disenfranchisement of African Americans.