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The U.S capital is moved from Philadelphia to Washington DC.
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Thomas Jefferson is elected as the third president of the United States.
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The United States pays $15 million to purchase the Louisiana territory. The lands extend west from the Mississippi River to the Rocky Mountains. This nearly doubles the size of the United States.
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Lewis and Clark set out on an expedition in order to find a route to the Pacific Ocean. They begin in St. Louis and set out westward.
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Louis and Clark reach the Pacific Ocean.
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James Madison is elected as the fourth president of the United States.
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The United States declares war on Britain over British interference with maritime shipping and westward expansion.
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James Monroe is elected as the fifth president of the United States.
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In an effort to balance out the free states and the slave states. Maine was admitted to a free state so that Missouri could be admitted as a slave stat. Although having slaves is prohibited within the lands acquired from the Louisiana Purchase
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John Quincy Adams is elected as the sixth president of the United States.
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Andrew Jackson is elected as the seventh president of the United States.
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Andrew Jackson signs the Indian Removal Act in order to send Native Americans away from their homes in order to gain land for the United States benefit.
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Texas gains independence from Mexico.
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The United States declares war on Mexico in hopes to gain California and other southwest territory.
