There was a show on the History channel about the Comanche. This was years ago when they actually did shows about history, rather than 4 straight hours in a pawn shop.

This was a 2 hour show and it featured Fehrenbach, had him on for 15 or 20 minutes, he was an interesting interview. I remember he talked about the "last stand" up in a canyon in N. Texas or maybe Colorado, in the 1870s, hundreds of Comanche were hiding in there, the Army came in there and annihilated hundreds of horses in the Comanche herd, they figured "No horse, no Comanche."