The Chamizal dispute was caused by a shift in which one of the principal rivers in the southwest United States and northern Mexico?
Rio Grande The Rio Grande ( or ; Spanish: Río Bravo del Norte , ] or simply Río Bravo) is one of the principal rivers in the southwest United States and northern Mexico (the other being the Colorado River). The Rio Grande begins in south-central Colorado in the United States and flows to the Gulf of Mexico. Along the way, it forms part of the Mexico–United States border. According to the International Boundary and Water Commission, its total length was 1896 mi in the late 1980s, though course shifts occasionally result in length changes. Depending on how it is measured, the Rio Grande is either the fourth- or fifth-longest river system in North America.
Guayape River The Guayape River" ("Río Guayape in Spanish) is a major river that drains much of the Department of Olancho and central Honduras. The largest tributary to the Guayape is the Río Jalán, which joins it at El Plomo, not far from the town of Juticalpa. From there the river passes many small towns, including El Esquilinchuche. The largest bridge over the Guayape is the Puente del Burro, a modern cement structure that replaced the huge steel suspension bridge that had stood for decades after being built by the US Army Corps of Engineers, and was destroyed by Hurricane Mitch in 1998. Far downriver from the bridge, the Guayape joins with the Guayambre River, from then on the waterway is known as the Río Patuca.