USA HISTORY

Detailed explanation-1: -Mexico claimed that the southern boundary of Texas was the Nueces River, the Texan boundary while under Mexican rule. Americans, as well as the incoming President, claimed that the boundary of Texas was the Rio Grande River.

Detailed explanation-2: -The United States and Mexico share the waters of the Colorado River and the Rio Grande. A bilateral water treaty from 1944 (the 1944 Water Treaty) and other binational agreements guide how the two governments share the flows of these rivers.

Detailed explanation-3: -Texas claimed the Rio Grande as its southern border. Mexico said the Nueces River, to the north, should be the border. The dispute simmered until Dec. 29, 1845, when the U.S. annexed the Lone Star State, and sent troops to the Rio Grande a month later.

Detailed explanation-4: -Upon the conclusion of the TEXAS REVOLUTION, the Republic of Texas contended that the Rio Grande marked its border with Mexico, while Mexico argued that the Nueces River was the boundary. Consequently, both countries laid claim to the area between the two rivers, known as the Nueces Strip.

Detailed explanation-5: -The Rio Grande serves as the border here. “The Rio Grande is a natural border, has been since 1848, and the ties between cities and towns on either side are strong, ” CNN’s Gregory Krieg reported.