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Thomas Jefferson became the first president in this decade, becoming the third U.S. president.
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Jefferson buys Louisiana from France, doubling the size of America.
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U.S. explorers Lewis and Clark head west on their two-year, 8000 mile expedition to explore the newly purchased Louisiana territory.
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U.S. founding fathers Aaron Burr and Alexander Hamilton fight a duel. Hamilton loses and dies.
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At the Battle of Tippecanoe, Indigenous peoples led by Tecumseh fight and lose a major battle opposing White settlement.
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The Erie Canal opens, making New York the Empire State.
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Texas has a legendary battle for their independence at the Alamo.
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Ireland is ravaged by the Great Famine, spurring one of the great migrations of people to the U.S.
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U.S. President James K. Polk confirms that quantities of gold have been discovered and Gold Fever strikes the thousands of people who rush to California.
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The United States is torn by the Civil War.
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Lt. Colonel George A. Custer meets his end in an ill-considered fight with assembled Indigenous troops at the Battle of the Little Bighorn.