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US History Overview

Jun 19, 2025

Overview

This lecture provides a comprehensive history of the United States from pre-Columbian times through colonization, independence, civil war, industrialization, global conflicts, and into the modern era, highlighting major events, movements, social changes, and political developments.

Early America and Colonization

  • Native Americans developed complex societies before European arrival.
  • Norse explorer Leif Erikson established settlements in North America around 1000 CE, later abandoned.
  • Columbus's 1492 voyage initiated European exploration and colonization in the Americas.
  • Early European settlements included Spanish St. Augustine (first permanent), English Jamestown (first successful English), and Plymouth (founded by Pilgrims seeking religious freedom).
  • European diseases devastated Native populations; conflicts and alliances shaped colonial expansion.

Colonial Growth and Conflict

  • Colonization expanded with English, French, Dutch, and Spanish settlements.
  • Trading, agriculture, and the transatlantic slave trade (Triangle Trade) fueled economic growth.
  • Colonial wars (e.g., King Philip's War, French and Indian War) shaped North America's political landscape.

Road to Independence

  • Post-1763, British taxation (Sugar Act, Stamp Act, Townshend Acts) without colonial representation led to unrest ("no taxation without representation").
  • Events like the Boston Massacre and Boston Tea Party increased tensions.
  • Intolerable Acts prompted the formation of the First Continental Congress.
  • Revolutionary War began in 1775; Declaration of Independence signed July 4, 1776.

Revolution and Foundation of Government

  • Continental Army led by George Washington; key victories at Trenton, Saratoga (secured French alliance), and Yorktown (British surrender).
  • Articles of Confederation created a weak central government; replaced by the Constitution in 1787.
  • U.S. Constitution established federal system with executive, legislative, and judicial branches; Bill of Rights added fundamental freedoms.

19th Century Expansion and Division

  • The U.S. expanded westward under the concept of Manifest Destiny; acquired territories through purchase (Louisiana), war (Mexican-American War), and treaties.
  • Native Americans were forcibly relocated (Trail of Tears).
  • Slavery became increasingly divisive; the Underground Railroad aided escapes.
  • Compromises (Missouri, 1850) tried to balance slave/free state interests; conflicts like "Bleeding Kansas" foreshadowed civil war.

Civil War and Reconstruction

  • Abraham Lincoln's election (1860) led to Southern secession.
  • Civil War (1861–1865): Union (North) vs. Confederacy (South) over states' rights and slavery.
  • Major events: Emancipation Proclamation, battles of Gettysburg and Vicksburg, Lee's surrender at Appomattox.
  • Reconstruction (1865–1877): 13th (abolition of slavery), 14th (citizenship), and 15th (voting rights) Amendments; rise of Jim Crow laws after its end.

Industrialization and Gilded Age

  • Rapid economic growth, urbanization, immigration, and westward expansion marked the Gilded Age (late 1800s).
  • Wealth inequality, worker strikes, and labor reform gained attention.
  • Progressive Era reforms addressed monopolies, labor standards, and social issues.

U.S. as a World Power

  • Spanish-American War (1898): U.S. acquired Guam, Puerto Rico, Philippines, and annexed Hawaii.
  • Panama Canal completed in 1914; increased U.S. international influence.
  • U.S. entered WWI in 1917; contributed to Allied victory and global reordering.

20th Century Challenges and Changes

  • Roaring 20s: Urbanization, new social norms, consumerism, Prohibition.
  • Great Depression (1929) led to New Deal reforms under FDR.
  • WWII: U.S. joined after Pearl Harbor, fought in Europe and Pacific, ended with atomic bombings of Hiroshima and Nagasaki.
  • Postwar: Cold War rivalry with USSR, Korean and Vietnam wars, Civil Rights Movement (Brown v. Board, Civil Rights Act 1964, Voting Rights Act 1965).

Modern America

  • Social and technological change: Moon landing (1969), rise of computers and the internet, economic booms and busts (dot-com, Great Recession).
  • Recent history: 9/11 attacks, wars in Afghanistan and Iraq, the Great Recession (2008), first African-American president (Obama), increasing political polarization, and the COVID-19 pandemic.
  • Ongoing issues: racial justice movements, climate challenges, and a deeply divided political landscape.

Key Terms & Definitions

  • Manifest Destiny — The belief that the U.S. was destined to expand across North America.
  • Articles of Confederation — The first constitution of the U.S., later replaced by the current Constitution.
  • Emancipation Proclamation — 1863 declaration freeing slaves in Confederate states.
  • Gilded Age — Era marked by economic growth and stark social inequality (late 1800s).
  • Progressive Era — Period of social and political reform (early 1900s).
  • Cold War — Period of tension and competition between the U.S. and USSR (1947–1991).

Action Items / Next Steps

  • Review the U.S. Constitution and Bill of Rights for foundational principles.
  • Study major wars' causes, key events, and outcomes (Revolution, Civil War, WWI, WWII).
  • Prepare timelines of major American social and political movements for reference.
  • Read assigned primary sources: Declaration of Independence, Gettysburg Address, "I Have a Dream" speech.