Reshaping America in the Early 1800s 6.3:
America Achieves Manifest Destiny
Reshaping America in the Early 1800s Lesson 3 America
Achieves Manifest Destiny
Learning Objectives
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Explain how the Mexican-American War helped the United States achieve the goal
of Manifest Destiny.
Identify the causes and effects of the California Gold Rush.
Reshaping America in the Early 1800s Lesson 3 America
Achieves Manifest Destiny
Key Terms
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Treaty of Guadalupe Hidalgo
Gadsden Purchase
Wilmot Proviso
California Gold Rush
forty-niners
placer mining
hydraulic mining
Realizing Manifest Destiny
As a result of its quick victory in the Mexican-American War, the United States finally
achieved the expansionists’ goal of Manifest Destiny. Yet, the long-term effects of the
war served to highlight growing differences between North and South and set the
stage for future conflict.
REALIZING MANIFEST DESTINY
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Treaty of Guadalupe Hidalgo – Ended the Mexican War
and ceded them to give up the northern third of their
county.
Us also paid Mexico 15 Million for New Mexico and
California and secured the Rio Grande as the southern
boundary
Gadsen Purchase – strip of land in southern Arizona and
New Mexico needed for a future railroad.
Wilmot Proviso – bill sent to Congress for 15 strait years
outlawing slavery in acquired Mexican Territory. Passed
the House each time but failed in the Senate.
Realizing Manifest Destiny
The Treaty of Guadalupe Hidalgo, shown here, ended the Mexican-American War. Under the treaty,
the United States gained vast new territories in exchange for a large lump payment to Mexico.
Realizing Manifest Destiny
Analyze Maps How did the cessions of regions by Mexico affect the overall growth of the United
States?
The California Gold Rush
To most Americans, the new lands in the West seemed too distant for rapid settlement.
But in early 1848, workers at John Sutter’s sawmill found flecks of gold in the
American River east of Sacramento, California.
THE CALIFORNIA GOLD RUSH
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California Gold Rush – 80,000 fortune seekers in 1849 headed
to California to strike it rich.
Called forty-niners
25,000 Chinese immigrated as well.
Placer miner – when you sift dirt from streams looking for gold
Mining communities rough, no women, no family, no law.
Miners did not get rich, the merchants that sold goods to the
miners did
hydralic mining – use water to erode hillsides and catch gold on
other side.
Big mines were expensive and only rich could operate them
May native Mexicans lost jobs, lost land, and had to pay a foreign
miners’ tax.
California wanted to enter the US as a free state but would upset
the balance of 15 free and 15 slave states (Wilmot Proviso)
The California Gold Rush
Analyze Maps In which regions of California were most gold strikes located?
The California Gold Rush
Placer mining used water to sort through gravel and other material in order to find valuable gold,
which would sink as other material washed away. Infer What challenges made placer mining slow
and difficult?
The California Gold Rush
Analyze InformationWhat were the immediate economic effects of the Gold Rush in California cities
and towns?
The California Gold Rush
Analyze Data What changes in California caused the patterns shown here?
Quiz: Realizing Manifest Destiny
The key purpose of the Wilmot Proviso was
A.
B.
C.
D.
to secure southern Arizona and the New Mexico territories.
to ban slavery in all territories gained from Mexico.
to finalize the terms of Mexico's surrender.
to secure the southern border of Texas.
Quiz: The California Gold Rush
California statehood increased political tensions because it
A.
B.
C.
D.
seemed to reduce the rights of the gold miners.
threatened to turn California into a slave state.
suggested that the territory would no longer be part of Mexico.
threatened the congressional balance between slave and free states.