Following the tactics he had employed in Virginia [the Shenandoah Valley], Sheridan sought to strike directly at the material basis of the Plains Indian nations. He believed—correctly, it turned out—that attacking the Indians in their encampments during the winter would give him the element of surprise and take advantage of the scarce forage available for Indian mounts. He was unconcerned about the likelihood of high casualties among noncombatants, once remarking that “If a village is attacked and women and children killed, the responsibility is not with the soldiers but with the people whose crimes necessitated the attack.”
Well of course.
As quoted from that hotbed of Neo-Confederates, PBS.