Mexico.
i belive texas won it but dont know so find out
The border
Yes, Daniel Webster played a significant role in resolving a border dispute between the United States and Mexico through the Webster-Ashburton Treaty of 1842. This treaty primarily addressed the boundary between British North America and the United States, but it also indirectly influenced U.S.-Mexico relations by clarifying borders in the region. Although it did not directly settle the U.S.-Mexico border, it helped create a framework for future negotiations.
Most of the Mexico-Belize border is defined by the Hondo River (Spanish: Rio Hondo).There is however, a Rio Hondo located in the US State of New Mexico, but it doesn't define any boundary with the country of Mexico.
Mississippi
The Rio Grande river.
Rio Grande
Rio Grande
Rio Grande
Rio Grande
The Rio Grande.