Every time the Mexicans and the Spanish before them tried to settle in any numbers in Texas the Apaches and especially
the Comanches would wipe them out.
In Texas it wasn’t the Army vs. the Indians, It was the Anglo/Scots-Irish settlers from Ky., Tenn. and the deep South vs. the Indians. They were the only group that could handle ‘em. And even then, it wasn’t easy. The Comanches were probably the meanest, toughest tribe of Indians in the New World. They ran the Apaches all the way to Arizona.
Seems they also stopped the conquistadores as well.
Some of us refer to the Commanches as the “Plains Nazis”. A very nasty group. Other Indian tribes probably had worse things to say about them. It was an utterly sadistic group.