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After ties in the electoral college and a very tense election with a split House, Thomas Jefferson becomes the third President of the United States.
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The U.S. signs to buy land west of the Mississippi River and New Orleans, the treaty being signed by James Monroe and Robert Livingston.
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The War of 1812 came as a result of British violations towards Americans rights.
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Francis Scott Key writes the Star Spangled Banner as a poem after seeing the effects of the War of 1812.
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The Missouri Compromise admits Missouri into America as a slave holding state, while Maine is admitted as a free state.
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Signed by President Andrew Jackson, the Indian Removal Act gave the president the ability to negotiate and remove Native Americans to western lands.
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Eli Whitney invents the cotton gin, which revolutionizes the production of cotton and benefits the South.
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The Mexican came from conflicts between America and their southern neighbors, resulting in the Treaty of Guadalupe.
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Several states issue their secession from the Union, then moving on to found their new country, the Confederate States of America.
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After an attack on Fort Sumter, President Abraham Lincoln declares war on the South when he requests 75,000 soldiers to volunteer to fight for the Union.
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The order was issued by President Lincoln, ordering an official end to slavery if the Union were to win the Civil War.