Chapter 12


Westward Expansion
(1820 - 1860)


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California

• Americans in California overthrew the Mexicans in 1846, declaring the independent nation of the Bear Flag Republic

• Soon afterwards, California joined the United States.

Treaty of Guadalupe Hidalgo – 1848

• Mexico recognized the Texas-Mexico border as the Rio Grande.

• Mexico ceded the Mexican Cession to the United States.

• Today, the Mexican Cession are the states of California, Nevada, Utah, and parts of Arizona, New Mexico, Colorado, and Wyoming.

• The United States paid Mexico $15 million.

Gadsden Purchase

• The United States bought southern New Mexico and Arizona for $10 million.






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