In the middle of the arid summer of 1877, a drought year in West Texas, a troop of some forty buffalo soldiers (African American cavalry led by white officers) struck out into the Llano Estacado from Double Lakes, south of modern Lubbock, pursuing a band of Kwahada Comanches who had been raiding homesteads and hunting parties. A group of twenty-two buffalo hunters accompanied the soldiers as guides and allies. Several days later three black...