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Mexico wins independence from Spain
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The Erie Canal is opened
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The Indian Removal Act is passed
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Worcester v. Georgia
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The Texas Rebellion begins
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Treaty of New Echota is signed
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The Alamo is taken by Mexican troops
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John Tyler's Treaty proposing the Annexation of Texas is defeated in the Senate
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Congress passes a measure to Annex Texas
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Texas convention votes to accept annexation
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Texas is admitted to the Union
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Polk receives word that Mexican forces have ambushed two American companies
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The Donner Party is snowbound
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Gold is discovered in California
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The Treaty of Guadalupe Hidalgo is signed
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California is admitted to the Union
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The first transcontinental railroad is completed
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The Battle of Little Bighorn
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The Dawes Severalty Act is passed
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The Massacre at Wounded Knee
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Arizona is admitted to the Union