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1821
Mexico gains independence from Spain -
End of Alamo
Americans are defeated at the Alamo. -
John Tyler's start
John Tyler becomes president. -
Webster-Ashburton Treaty
Americans and British agree to the Webster-Ashburton Treaty -
Texas annex
United states annexes Texas -
Begin of War
Mexican-American War begins -
Treaty of Guadalupe Hidalgo
Treaty of Guadalupe Hidalgo ends the Mexican-American War. -
Gadsden Purchase
With the Gadsden Purchase, the United States acquires an additional 30,000 square miles from Mexico
