Westward and Southern Expansion
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Time Period
1790  - 1848
The United States’ expansion was rapid, pushing both west and south. Among the most notable acquisition was Thomas Jefferson’s Louisiana Purchase, a deal struck with France in 1803 that more than doubled the size of the young republic.

In the mid-1800s, U.S. President James Polk oversaw a series of annexations that would stretch U.S. states and territories from the Atlantic to the Pacific oceans.

The U.S. went to war with Mexico in 1846, triggered in part over the U.S. annexation of Texas the previous year. The Mexican war ended in 1848 with the Treaty of Guadalupe Hidalgo, the terms of which included the U.S. paying Mexico $15 million in exchange for present-day California, Nevada, Utah, most of New Mexico and Arizona, and parts of Colorado and Wyoming. Mexico also formally relinquished its stake on Texas.
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American Progress- Library of Congress, LC-DIG-ppmsca-09855

Lewis and Clark with Sacagawea- Wikimedia Commons

Oregon Trail campfire- Wikimedia Commons

Pioneers Crossing the Plains- Library of Congress, LC-USZC4-2634

Westward the Course of Empire Takes Its Way- Architect of the Capitol
Web Source(s)
The History Channel, "Louisiana Purchase"
"Treaty of Guadalupe Hidalgo"
Web Page Contributor
Sandi Dolbee
Affliated with: Former Religion and Ethics Editor, The San Diego Union-Tribune

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