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The Mexican-American War and the Gadsden Purchase

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Presents a map of North America during the presidency of Thomas Jefferson, and reveals that most of the continent was claimed by European powers. The segment provides context for Jefferson's attempt to purchase Louisiana from France, and summarizes why Napoleon Bonaparte sold Louisiana to the United States.

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In 1846, expansionist President James K. Polk declared war on Mexico after the Mexicans refused to cede California to the United States. American settlers staged a rebellion of their own, and for a brief period California was an independent republic. In 1850 California became the 31st state in the Union.

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Explains how the creoles responded to the Spanish King Charles III's decision to revoke several of the rights that they had: They fought for their independence. The result was an independent nation with a constitution, ruled by Guadalupe Victoria.

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Access on-demand teaching strategies, interactive professional development courses, and membership to the Discovery Educator Network-one of the largest professional networks of educators in the world.