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The Louisiana Purchase was a land deal between the US and France. The deal composed of 827,000 square miles of land west of the Mississippi River for $15 million. The land eventually doubled the size of the US. It greatly strengthened the country materially and strategically. It also confirmed the doctrine of implied powers of the federal constitution.
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Lewis and Clark set out from St. Louis, Missouri on expedition to explore the West and find a route to the Pacific Ocean.
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To preserve the balance of power in Congress between slave and free states, the Missouri Compromise was passed admitting Missouri as a slave state and Maine as a free state.
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During is annual address to congress, president Monroe declares that the American continents were to become off-limits for further colonization by European powers.
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This act was enforced my president Jackson. It forced the removal of Native Americans living in the eastern part of the country to lands west of the Mississippi River.
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This treaty essentially ended the Mexican War. Mexico agreed to cede to the United States California and New Mexico in exchange for $15 million and assumption by the United States of claims against Mexico by U.S. citizens
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Harriet Tubman escapes from slavery and becomes one of the most celebrated members of the Underground Railroad.
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The American Civil War was fought in the US between northern states loyal to the Union and southern states that had been seceded to form the Confederate States of America.