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Daniel Boone explores Kentucky for the first time
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Thomas Jefferson buys the Louisiana territory from France for $15 million.
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Lewis and Clarke map out the territory of the Louisiana Purchase and reach the Pacific Ocean
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Native Americans are forced to move from the southeast to the west of the Mississippi River
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Mexicans attack the Alamo, killing a massive number of Texans. This spurs the Texas Revolution
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The Cherokees are forced to march west leading to thousands of casualties
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People begin to travel west in wagon trains on the Oregon Trail. Over the next 20 years, 300,000 people took the trail.
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The expansion is described as "Manifest Destiny" by Journalist John O. Sullivan. Manifest Destiny revolves around the idea that the U.S. is destined to expand.
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Texas finally becomes a part of the United States, which led to the Mexican-American war.
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Mormons move to salt lake city to avoid persecution.
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England hands over the Oregon Territory to the U.S. by signing the Oregon Treaty.
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The War starts over the rights to Texas. The U.S. pays Mexico $15 million for land that would later become California, Texas, Arizona, Nevada, Utah, and parts of several other states. It lasts for two years.
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People rush to California after the discovery of huge deposits of gold.
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Around 90,000 "Forty-Niners" move to California to find gold.
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The First Transcontinetal Telegraph line is finished leading to the shut down of the Pony Express.
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The U.S. government agrees to fund a railroad from California to Missouri.
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The Government starts offering free land to people who are willing to live there for five years and improve the land. People rush to places like Oklahoma.
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The Union Pacific Railroad and the Central Pacific Railroads connect at Promontory, Utah and the railroad is finished.
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The Yellowstone National Park is dedicated as the nation's first national park by President Ulysses S. Grant.
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An American Indian army composed of Lakota, Northern Cheyenne, and Arapahoe defeat General Custer and the 7th Calvary.
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