The Comanche's Battle for Adobe Walls

Kit Carson confronted 1600 Comanches and started firing the Howitzer's. The Comanches took off, terrified by the insane new property. But rather than pursuing them, Carson told his men to take a break. When the army bugler sounded advanced, the Comanche bugler would sound retreat. Who would blow the reverse of the army bugle? Now Dave, I didn't want to take a side, but you forced me to.