Claiming the Rio Grande rather than the Nueces River as the boundary of Texas gave the United States a claim to __________.

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Claiming the Rio Grande rather than the Nueces River as the boundary of Texas gave the United States a claim to New Mexico and parts of Colorado. This was a significant aspect of the U.S. expansionist policy in the mid-19th century, leading to the Mexican-American War.

Claiming the Rio Grande Rather Than the Nueces River as the Boundary