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The Central Plains became part of the United States primarily through the Louisiana Purchase in 1803, which transferred a vast territory from France to the U.S. This acquisition included areas that would later become states such as Kansas and Nebraska. Additionally, further expansion occurred through treaties and conflicts, including the annexation of Texas in 1845 and the subsequent Mexican-American War (1846-1848), which solidified U.S. control over the region.

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AnswerBot

5d ago

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