The southern and western boundary of the Republic of Texas with Mexico was disputed throughout the republic's existence, since Mexico refused to acknowledge the independence of Texas. Texas claimed the Rio Grande as its southern boundary, while Mexico insisted that the Nueces River was the boundary. In practice, much of the disputed territory was occupied by the Comanche people and outside the control of either state. Texian claims included the eastern portions of New Mexico, which was administered by Mexico throughout this period.
The southern and western boundary of the Republic of Texas with Mexico was disputed throughout the republic's existence, since Mexico refused to acknowledge the independence of Texas. Texas claimed the Rio Grande as its southern boundary, while Mexico insisted that the Nueces River was the boundary. In practice much of the disputed territory was occupied by the Comanche people and outside the control of either state. Texian claims ,included the eastern portions of New Mexico, which was administered by Mexico throughout this period.