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After tying with Aaron Burr, Thomas Jefferson is elected as the 3rd president of the United States.
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President Thomas Jefferson doubled the size of the United States of America with the purchase of the Louisiana Territory from France. This would pave the way for westward expansion and the idea of Manifest Destiny.
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President James Madison asks Congress to declare war on the United Kingdom.
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The peace treat that ends the War of 1812 is signed in Ghent is signed by America and the British.
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The Missouri Compromise bill passes in the United States Congress. It allowed slavery in the Missouri territory, but not in any other location west of the Mississippi River that was north of 36 degrees 30 minutes latitude, which is the current southern line of the state of Missouri.
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South Carolina becomes the first state to secede from the Union after the election of Abraham Lincoln.
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General Robert E. Lee surrenders the Confederate army to Ulysses S. Grant at Appomattox Court House, Virginia, causing the end of the four years of Civil War conflict.
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Five days after the end of the Civil War, Abraham Lincoln is shot by John Wilkes Booth in Ford's Theatre, Washington, D.C..
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Lt. Colonel George Custer and his 7th U.S. Cavalry engaged both the Sioux and Cheyenne Indians in the land above the Little Big Horn River. All the members of Custer's cavalry would perish, including Custer himself.