John Tyler: 10th President of the United States (1841-1845); annexed Texas.
Webster-Ashburton Treaty (1842): Resolved border disputes between the U.S. and British Canada, particularly Maine.
Manifest Destiny: Belief that the U.S. was destined to expand across the North American continent.
Lewis Cass: U.S. Senator and advocate for popular sovereignty to decide slavery in territories.
Sam Houston: Leader of Texas independence; first president of the Republic of Texas.
Mexican-American War: (1846-1848) War between the U.S. and Mexico over territory.
Oregon Fever: Mass migration to Oregon in the 1840s, fueled by Manifest Destiny.
49th Parallel: Boundary line dividing U.S. and British Canada in the Oregon Treaty (1846).
Franciscan Missions: Religious outposts in California by Spanish Franciscans to convert Native Americans.
Annexation of Texas: The U.S. incorporation of Texas in 1845, leading to tensions with Mexico.
Annexation of California - Bear Flag Republic: Short-lived independent California before U.S. annexation in 1846.
John C. Fremont: Explorer and military officer who contributed to U.S. expansion in California.
James K. Polk: 11th U.S. President; champion of Manifest Destiny, annexed Texas, and oversaw the Mexican-American War.
Winfield Scott: U.S. general in the Mexican-American War; captured Mexico City.
Zachary Taylor: U.S. general and later president; led key victories in the Mexican-American War.
Treaty of Guadalupe Hidalgo: Ended the Mexican-American War; ceded vast territories to the U.S.
Wilmot Proviso: Proposal to ban slavery in territories acquired from Mexico.
Mexican Cession: Land ceded by Mexico to the U.S. in 1848, including California and the Southwest.
Matthew C. Perry: Naval officer who opened Japan to trade with the U.S. in 1854.
Gadsden Purchase: 1854 acquisition of land from Mexico to facilitate a southern transcontinental railroad.
Clayton-Bulwer Treaty: 1850 agreement between the U.S. and Britain to avoid conflict over Central American canals.
Popular Sovereignty: Policy allowing territories to decide on slavery by vote.
Secession: Withdrawal of Southern states from the Union, leading to the Civil War.
Free-Soil Party: Political party opposing the expansion of slavery into western territories.
California Gold Rush: Mass migration to California after the 1848 gold discovery.
Compromise of 1850: Laws addressing slavery and territorial disputes; included the Fugitive Slave Act.
The Great Debate: Congressional debate over the Compromise of 1850.
Stephen A. Douglas: Senator who championed popular sovereignty and the Kansas-Nebraska Act.
Nativism: Anti-immigrant sentiment; associated with the Know-Nothing Party.
Fugitive Slave Law: Required citizens to assist in the capture of runaway slaves.
Underground Railroad: Network aiding escaped slaves to freedom.
Harriet Tubman: Escaped slave and prominent Underground Railroad conductor.
Uncle Tom’s Cabin: Anti-slavery novel by Harriet Beecher Stowe that fueled abolitionist sentiment.
Harriet Beecher Stowe: Author of Uncle Tom’s Cabin.
Franklin Pierce: 14th U.S. President; signed the Kansas-Nebraska Act.
Kansas-Nebraska Act: Allowed popular sovereignty in Kansas and Nebraska; repealed the Missouri Compromise.
“Bleeding Kansas”: Violent conflicts in Kansas over slavery.
Sumner-Brooks Incident: Violent attack on Senator Charles Sumner by Representative Preston Brooks.
Know-Nothing Party: Anti-immigrant and anti-Catholic political party.
Republican Party: Founded in the 1850s to oppose slavery's expansion.
John Brown’s Raid on Harpers Ferry: Failed abolitionist uprising to incite a slave rebellion.
James Buchanan: 15th U.S. President; failed to prevent secession.
Dred Scott vs. Sanford (1857): Supreme Court ruling that African Americans were not citizens.
Lecompton Constitution: Pro-slavery Kansas constitution rejected by Congress.
Panic of 1857: Economic downturn that heightened sectional tensions.
Abraham Lincoln: 16th U.S. President; led the nation during the Civil War.
Lincoln-Douglas Debates: Series of debates on slavery between Abraham Lincoln and Stephen Douglas.
Freeport Doctrine: Douglas's stance that territories could exclude slavery despite the Dred Scott decision.
Fort Sumter: Site of the first Civil War battle in 1861.
Border States: Slave states that stayed in the Union.
Jefferson Davis: President of the Confederate States during the Civil War.
Civil War: (1861-1865) Conflict between the Union and Confederacy over slavery and states' rights.
Ulysses S. Grant: Union general and 18th U.S. President; led Union to victory.
Battle of Bull Run: First major battle of the Civil War.
“Anaconda Strategy”: Union strategy to blockade Southern ports and control the Mississippi River.
Robert E. Lee: Confederate general; led Southern forces during the Civil War.
Thomas “Stonewall” Jackson: Confederate general known for his tactical prowess.
Emancipation Proclamation: Lincoln’s declaration freeing slaves in Confederate territories.
Gettysburg Address: Lincoln’s speech emphasizing national unity and equality.
Battle of Vicksburg: Union victory that secured control of the Mississippi River.
Battle of Gettysburg: Turning point in the Civil War; Union victory.
March to the Sea: General Sherman’s destructive campaign through Georgia.
Surrender at Appomattox Courthouse: Confederate surrender, ending the Civil War.
Homestead Act: Granted free land to settlers to encourage western expansion.
Pacific Railway Act: Legislation promoting construction of the transcontinental railroad.
Thirteenth Amendment: Abolished slavery.
Fourteenth Amendment: Granted citizenship to all born or naturalized in the U.S.
Fifteenth Amendment: Guaranteed voting rights regardless of race.
Radical Republicans: Advocated strong Reconstruction policies and rights for freedmen.
Freedmen’s Bureau: Federal agency aiding freed slaves during Reconstruction.
Reconstruction: Post-Civil War period of rebuilding and reintegrating the South.
John Wilkes Booth: Assassinated President Lincoln.
Andrew Johnson: 17th U.S. President; impeached for opposing Radical Reconstruction.
Black Codes: Laws restricting freedmen’s rights in the South.
Sharecropping: Agricultural system where freedmen worked land for a share of the crop.
Thaddeus Stevens: Radical Republican leader in Congress.
Carpetbaggers: Northerners who moved South during Reconstruction.
Scalawags: Southern whites who supported Reconstruction.
Horace Greeley: Editor and Liberal Republican presidential candidate in 1872.
Ku Klux Klan: White supremacist group opposing Reconstruction and Black rights.
Compromise of 1877: Ended Reconstruction; removed federal troops from the South