The border dispute between the U.S. and Mexico involved which two rivers?

The correct answer pertains to the border dispute between the United States and Mexico during the mid-19th century, particularly leading up to and following the Mexican-American War (1846-1848). The conflict revolved around the boundaries of Texas, with both the Nueces River and the Rio Grande being cited as potential borders.

The Nueces River was claimed by Mexico as the boundary of Texas, while the United States, particularly under the leadership of President James K. Polk, asserted that the Rio Grande was the legitimate border. This disagreement over the exact demarcation of the border contributed significantly to rising tensions and ultimately to the war itself, as U.S. troops were stationed in territories that Mexico claimed, leading to military confrontations.

Other river pairs listed do not relate to this specific border dispute. The Mississippi and Missouri Rivers are located in the central United States and were not involved in any border negotiations with Mexico. The Columbia and Ohio Rivers are also unrelated, situated far from the contested territory. Similarly, the Rio Grande and the Colorado Rivers are distinct from the context of this specific border conflict, as the Colorado River lies further to the west and was not part of the U.S.-Mexico boundary dispute surrounding Texas. Thus, the significance of the Nue