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The thirteen colonies were a group of british colonies on the Atlantic coast of North America during the 17th and 18th centuries. Grievances against the imperial government led to 13 colonies to begin uniting in 1774.

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The Louisiana Purchase was the acquisition of the territory of Louisiana by the United States from the French First Republic in 1803. This condidted of most of the land in the Mississippi Rivers drainage basin west of the river.

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The convention respecting fisheries, boundary and the restoration of slaves, also known as the London Convention, Anglo- American Convention of 1818, convention of 18818, or simply the Treaty of 1818, is an international treaty of 1818, is an international treaty signed in 1818 between the United States and the United Kingdom.

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Texas was annexed by the United States in 1845 and became the 28th state. Until 1836, Texas has been part of Mexico, but in the that year a group of settlers from the United States who lived in Mexican Texas declared independence.

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Under the terms of the treaty negotiated by Trist, Mexico ceded to the United States upper California and New Mexico. This was known as the Mexican Cession and included present- day Arizona and New Mexico and parts of Utah.

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The Territory of Oregon was an organized incorporated territory of the United States that existed from August 14th 1848, until February 14, 1859, when the southwestern portion of the territory was admitted to the Union as the state of Oregon.

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The Gadsden Purchase is a roughly 30,000 square- mile region of present-day southern Arizona and southwestern New Mexico that was acquired by the United States in a treaty signed by American ambassador to Mexico James Gadsden on December 30, 1853

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The Territory of Florida was an organized incorporated territory of the United States that existed from March30, 1822, until March 3, 1845, when it was admitted to the Union as the State of Florida.