The Tejanos who died defending the Alamo were Juan Abamillo, Juan Badillo, Carlos Espalier, Gregorio Esparza, Antonio Fuentes, José María Guerrero, Damacio Jimenes, Toribio Losoya, and Andrés Nava. Juan Sequin, the most prominent Tejano at the Alamo, was away from the garrison looking for reinforcements when the Alamo fell on 6 March. Sequin then raised a company of two dozen Tejanos and led them at the Battle of San Jacinto.

The Mexican Army was a professional, European-style army. Santa Anna crossed the Rio Grande on 16 February and made it to San Antonio by the 23rd without firing a shot. There was no need for him to impress local Tejanos, nor were very many local Tejanos to impress for reasons discussed earlier in this thread.

It is true that Mexican army included both veteran units and new recruits. Santa Anna didn't think much of the recruits. His orders at the Alamo insisted that they stay in camp during the actual assault. He writes, in his description of San Jacinto, that the recruits "formed platoons" that surrounded the veterans so neither group could use their arms.

It's true that Hispanic-Texans are sometimes considered foreigners by some Anglo-Texans, even if their ancestors have been here for generations. It ain't right, but it's certainly true.
- Phil