Which Mexican states were part of Texas historically?

The correct answer identifies Coahuila and Chihuahua as historically significant regions that were part of Texas during the period of Mexican governance.

In the early 19th century, Texas was part of the larger province of Coahuila y Tejas, which was established by Mexico following its independence from Spain in 1821. The state of Coahuila encompassed a significant portion of what is now Texas, and Chihuahua was adjacent, sharing a historical connection through various land grants and settlements.

This understanding is critical, as it highlights the complex historical and cultural ties between Texas and these Mexican states. In contrast, Nuevo Mexico and Tamaulipas, while geographically close to Texas, do not have the same direct historical governance relationship with Texas. The regions of California and Arizona were ultimately part of the United States after the Mexican-American War but were never part of Texas under Mexican governance. Therefore, identifying Coahuila and Chihuahua as historically relevant states provides a clearer understanding of Texas's origins and its development in relation to Mexico.