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: -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-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: -In the 1830s, the Republic of Texas claimed the Rio Grande as its southern border; Mexico claimed the Nueces River (150 mi or 240 km north of the Rio Grande). The area between the two rivers became known as the Nueces Strip. Both countries invaded it, but neither controlled it nor settled it.