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A Great Leap Westward

This overview explores critical milestones in U.S. history between 1845 and 1860, including the Texas Annexation, the Oregon Treaty, and the Mexican War. It highlights the significant population growth and the expansionist mindset of the era, detailing demographic changes and economic developments, such as the rise of railroads and telegraphs. The data reflects the dramatic increase in population density and migration patterns to the West, particularly during the Overland Trails period. Understanding these events provides insight into the transformative effects of American expansion.

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A Great Leap Westward

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  1. A Great Leap Westward

  2. “Permanent” Indian Frontier

  3. Texas Annexation: 1845

  4. Oregon Treaty: 1846

  5. Mexican War: 1846-1848

  6. Expansionist Forces

  7. The Weight of Numbers

  8. Population Density: U.S. • 1790: 4.5 persons per square mile • 1800: 6.1 • 1810: 4.3 • 1820: 5.5 • 1830: 7.4 • 1840: 9.8 • 2000: 79.6

  9. Births Per 1,000 FemalesAges 20-40 • 2000: 14.4 • 1900: 30.1 • 1850: 43.3 • 1800: 55.0

  10. Number of Children, Grandchildren and Great-grandchildren Per Woman • 1990: 5.7 • 1890: 53.0 • 1790: 280.0

  11. Economic Interest

  12. A Revolution in Movement

  13. 1800

  14. 1830

  15. 1857

  16. 1930

  17. Macadam Road

  18. The Clermont (1807)

  19. Railroad Trackage: 1840-1860

  20. Railroads: 1850 and 1861

  21. Acceleration of Movement:Things vs. Information Railroad over Freight Wagon: How much faster? 10-15 times Telegraph over Pony Express: How much faster? 44,000,000 times

  22. Marching to the Pacific

  23. Overland Trails

  24. Overland Migration • To Pacific Coast, 1840-48: 14,247 • To Utah, 1840-48: 4,600 Total, 1840-48: 18,847 • To Pacific Coast, 1849-60: 239,150 • To Utah, 1849-60: 38,262 Total, 1849-60: 277,412 • Grand Total, 1840-60: 296,259

  25. State Populations, 1840 • Virginia: 1,025,000 • Arkansas: 98,000 • Michigan: 212,000 • Florida: 54,000 • New Hampshire: 284,500

  26. Oregon: The New Eden

  27. Willamette Valley

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