Did the United States or Mexico claim the boundary at Rio Grande?​

Explanation:

Conflict with Mexico began when the United States annexed Texas as a state in 1845. Mexico claimed that the new border between Texas and Mexico was the Nueces River, while the United States contested the border was the Rio Grande. Fighting began when a detachment of U.S. cavalry was attacked near the Rio Grande.

can you show the map

do your own work

you really need to do your own work and stop cheating