Texas claimed the Rio Grande as its southern border, while Mexico claimed the Nueces River to the north, so this caused border dispute. “Texas never controlled the territory of current day New Mexico…” (boundless.com). Texas was always trying to take land that was not theirs. “The westward movements of Americans and Manifest Destiny have been established as the overall causes for the Mexican-War.” (mexica.net). People kept trying to move west causing them to step into Mexican territory. “…it attempted to conquer that land in the Santa Fe expedition of 1841.” (boundless.com).Texas was capturing territory that they had no right to own since before the Mexican-American War. Mexico didn’t stop thinking that Texas was still theirs no matter where they put the boundary line
Texas claimed the Rio Grande as its southern border, while Mexico claimed the Nueces River to the north, so this caused border dispute. “Texas never controlled the territory of current day New Mexico…” (boundless.com). Texas was always trying to take land that was not theirs. “The westward movements of Americans and Manifest Destiny have been established as the overall causes for the Mexican-War.” (mexica.net). People kept trying to move west causing them to step into Mexican territory. “…it attempted to conquer that land in the Santa Fe expedition of 1841.” (boundless.com).Texas was capturing territory that they had no right to own since before the Mexican-American War. Mexico didn’t stop thinking that Texas was still theirs no matter where they put the boundary line