USA HISTORY

Detailed explanation-1: -In 1845 the United States annexed Texas and subsequently engaged in a dispute with Mexico over the southern Texas-Mexico border. Texas claimed that its southwest boundary extended to the Rio Grande. Mexico claimed that the boundary was the Nueces River, which is 100 miles (160 kilometers) eastward.

Detailed explanation-2: -However, the boundary between Texas and Mexico was disputed, with the Republic of Texas and the U.S. asserting it to be the Rio Grande and Mexico claiming it to be the more-northern Nueces River.

Detailed explanation-3: -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-4: -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-5: -The Mexico–United States border stretches from the Pacific Ocean in the west to the Gulf of Mexico in the east. Border states include the Mexican states of Baja California, Sonora, Chihuahua, Coahuila, Nuevo León, and Tamaulipas. U.S. states along the border are California, Arizona, New Mexico, and Texas.