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The US adopted land for the Northwest Territory.
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Lewis and Clark led the expedition to discover and map new land obtained by the Louisiana Purchase. They traveled 3,700 miles from the Mississippi River to the Pacific Ocean.
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The War of 1812 was between the United States and Great Britain. The US declared war because Britain started seizing American ships and their cargo. After it ended, the expantion started because the government was ready to expand the union.
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The Missouri Compromise was an effort from the government to diffuse the sectional rivalries.
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When Andrew Jackson was president the Indian Removal Act was passed which allowed the government to negotiate with the indians because they wanted the Native American's land. They moved the indians away from secitons of Mississippi, Georgia, and Florida.
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The mormons leader was assasinated and their homes were being invaded. So they migrated west to Utah.
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James W. Marshall discovered a gold nugget in the American River. A bunch of people heard about the gold mining and moved there. They were known as the 49ers.
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Thsi treaty ended the Mexican-American War. It ended the territorial dispute over Texas. The treaty gave the US present day Texas, California, Colorado, Arizona, Nevada, New Mexico, Utah, and Wyoming.
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The Oregan boundary dispute ended after the Oregan Treaty. Great Britain recieved the land north of the 49th parallel and the US gained the land south of it.
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It was an agreement between the US and Mexico. The US agreed to pay Mexico for a small portion of Mexico.
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This allowed the President of the US to survey the Native American trible land.
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The US gained the territory of Puerto Rico, the Phillapines, and Guam. It started because the American tariff put restictions on sugar imports and it hurt Cuba's economy. It took place in Cuba, the Philliapines, Puerto Rico, the Carribean Sea, and Guam.
