Indigenous peoples of Mexico
When Mexico gained independence in 1821, the casta system was eliminated as a legal structure, but racial divides remained. 
White Mexican argued about what the solution was to the "Indian Problem", that is indigenous who continued to live in communities and were not integrated politically or socially as citizens of the new republic. The Mexican constitution of 1824 has several articles pertaining to indigenous peoples. The second article of the constitution of Mexico recognizes and enforces the right of indigenous peoples and communities to self-determination and therefore their autonomy to:
History of Mexico
The inhabitants of Tejas declared the Republic of Texas independent from Mexico on 2 March 1836 at Washington-on-the-Brazos. They called themselves Texans and were led mainly by recent English-speaking settlers. At the Battle of San Jacinto on April 21, 1836, Texan militias defeated the Mexican army and captured General Santa Anna. The Mexican government refused to recognize the independence of Texas.