when did texas break from mexico?
The Republic of Texas had formed in 1836, after breaking away from Mexico in the Texas Revolution. The following year, an ambassador from Texas approached the United States about the possibility of becoming an American state.hen the war concluded, Mexico relinquished its claim on Texas, as well as other regions in what is now the southwestern United States. Texas's annexation as a state that tolerated slavery had caused tension in the United States among slave states and those that did not allow slavery.