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U.S. Territorial Expansion and Its Consequences

Dec 9, 2024

Crash Course U.S. History: Acquisition of Texas and California

Introduction

  • John Green discusses the acquisition of Texas and California by the United States.
  • References to Manifest Destiny and westward expansion to the Pacific.
  • Mention of economics and the Empire of Liberty regarding expansion.
  • Slavery is briefly mentioned but deferred for later discussion.

The Oregon Trail and Northern Mexico

  • By 1860, 300,000 people traveled the Oregon Trail.
  • Oregon was controlled by the US and Britain.
  • Northern Mexico included Texas, Arizona, Utah, Nevada, New Mexico, and California.
  • New Mexico and California had significant settlements with Native American majorities.

Texas Independence

  • Few Tejanos in Texas after Mexican independence.
  • Stephen Austin sold land to Americans, increasing American population in Texas.
  • Mexico annulled land contracts, banned further emigration, and prohibited slavery.
  • Texas elites demanded autonomy and continued use of slave labor.
  • Santa Anna’s control led to a revolt.
  • The Alamo was a significant event leading to Texas’s eventual independence.
  • Texas became the Lone Star Republic but sought U.S. annexation.

Annexation and the Balance of Power

  • Texas's wish for annexation was initially ignored due to the slavery issue.
  • Annexation delayed until James K. Polk's presidency.
  • U.S. Congress annexed Texas in 1845.
  • Agreement with Britain to divide Oregon restored Senate balance of slave/free states.

Mexican-American War

  • Polk sought California and used military action to provoke war.
  • War was controversial due to its expansionist aims and executive power increase.
  • Notable dissenters included Henry David Thoreau and Abraham Lincoln.
  • Treaty of Guadalupe Hidalgo ended the war, confirming Texas annexation and ceding California and more territories to the U.S.

Post-War Expansion

  • Acquisition fulfilled the U.S. expansion from Atlantic to Pacific.
  • Manifest Destiny led to tensions over governance and minority rights.
  • Rise in anti-Catholic, anti-immigrant sentiment with the American Party (Know-Nothings).

California and the Gold Rush

  • Discovery of gold in 1848 spurred massive migration.
  • California’s population boom allowed it to apply for statehood as a free state.
  • Significant Chinese immigration as labor for mining and railroads.
  • California’s constitution restricted civil participation to whites.

The Compromise of 1850

  • California admitted as a free state.
  • Slave trade banned in D.C., but slavery continued.
  • Enactment of a new fugitive slave law.
  • Popular sovereignty allowed territories to decide on slavery.

Conclusion

  • Manifest Destiny and acquisition of territories highlighted U.S. governance issues.
  • Expansion deepened divisions, particularly over slavery, leading to future conflicts.
  • Ralph Waldo Emerson's foresight on the consequences of territorial expansion.

  • Production Credits: Crash Course produced by Stan Muller, script by Ron Raoul Meyer and John Green.
  • Viewer engagement through comments and questions.

"Don't forget to be awesome." - John Green