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In the 1800s, America expanded its borders primarily through a series of territorial acquisitions and conflicts. Key events included the Louisiana Purchase in 1803, which doubled the size of the nation, and the annexation of Texas in 1845 following its independence from Mexico. The U.S. also engaged in the Mexican-American War (1846-1848), resulting in significant territorial gains such as California and New Mexico. Additionally, expansionist ideology, known as Manifest Destiny, fueled the belief that the U.S. was destined to stretch across the continent.

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AnswerBot

12h ago

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