From The Comanche Empire, by Pekka Hämäläinen (Yale U. Press, 2008), pp. 332-333:
For federal Indian officials, the Comanche situation was a stinging embarrassment: half a decade after the Civil War had eradicated institutionalized slavery, Comanches were trafficking in human merchandise on U.S. soil and with U.S. agents. The distressed settlers, sheep and cattle magnates, and government officials directed their frustration at the Peace Policy, which in their view had weakened rather than strengthened the United States’ hold on the Indians. They found a powerful ally in the military elite, who had opposed the Peace Policy from the beginning for strategic and personal reasons: the end of the Civil War and the reduction of the army had closed avenues for promotion, which only another war could reopen.
The opponents of the Peace policy found their opportunity in May 1871, when a Comanche and Kiowa raiding party attacked a supply train near Fort Richardson, killing and mutilating seven teamsters. The raiders narrowly missed General Sherman, who was on an inspection tour in Texas. Hearing of the attack, Sherman implemented a policy change, ordering four cavalry companies to pursue the raiders and, if necessary, to continue the chase in the Fort Sill reservation [which had until then been demilitarized]. He then stormed to Fort Sill to confront agent Tatum. The flustered agent conceded that the Quaker experiment was failing. On the next ration day, Tatum authorized the soldiers to arrest three Kiowa chiefs—Satanta, Satank, and Big Tree—and send them to Texas for civil trial. His Quaker ideology crumbling, Tatum asked the army to pursue the Kwahadas and Kotsotekas into Texas, confiscate their stolen stock, and force them to enter the reservation “as kindly as the circumstances will admit.” Although the Peace Policy remained the official policy, by fall 1871 if had become a dead letter on the southern plains. Tatum was replaced in early 1873 by an agent more committed to Quaker principles, but by that time hard action had become the norm.
When fighting Comanche campaigns, the U.S. Army was able to draw on its rapidly accumulating experience in fighting the Plains Indians. The Lakota wars had revealed that regular soldiers, although armed with Colt revolvers and Winchester repeating rifles, were a poor match for the highly motivated and mobile Indian warriors. convincing the military leadership that the army needed a decisive numerical advantage to defeat Plains Indians on the battlefield. But numbers were exactly what the army lacked. The eastern public, weary of war and eager for normalcy, was unwilling to finance Indian wars in the West. Young men were equally unenthused: the prospect of fighting Indians for meager pay and under vigorous discipline on the Great Plains drew few volunteers. The army’s main instrument in Indian wars was therefore the light cavalry, composed of ten regiments, approximately five thousand men in total.
Short of troops and wary of open battles, the army set out to deprive the Comanches of shelter and sustenance by destroying their winter camps, food supplies, and horse herds. By the early 1870s this kind of total warfare against entire populations was an established practice in the U.S. Army. Sherman had pioneered it against the Confederacy in his “March to the Sea,” and Sheridan had introduced a stripped-down version of it to the plains in his 1868–69 winter campaign against the Cheyennes. Culminating on the Washita River where the Seventh Cavalry [under George Armstrong Custer] killed nearly a hundred noncombatants and eight hundred horses and mules, Sheridan’s campaign broke Cheyenne resistance on the central plains. This success convinced the army that targeting civilians and economic resources was the most efficient—and since it shortened the conflict, the most humane—way to subdue the Indians. But the army could not simply duplicate Sheridan’s straightforward offensive against the Comanches, who ranged over a vast territory and had a more diverse subsistence base than the Cheyennes. To subdue the Comanches, the army was forced to launch the largest and most concentrated campaign of total war in the West.
It was only now, twenty-three years after the Treaty of Guadalupe Hidalgo, that Comanches came to feel the depth of the United States’ expansionist power. They had been exposed to that power before—most tangibly through Texas, whose territorial expansion into Comanchería was a corollary of the South’s economic expansion into Texas—but its full force had been curbed by several factors: relative American disinterest toward the Great Plains, the Civil War, and finally the Peace Policy. It was therefore all the more shocking when the United States unleashed its military might on Comanchería in 1871. Whatever difficulties the army may have faced in mobilizing soldiers for Indian wars, the troops that were mustered could draw on their nation’s enormous resources—superior technology; bottomless supply lines; an elaborate communication system; and a strong, tested central state apparatus. More important perhaps, the troops formed the vanguard of an ascending nation-state driven by a civilizing mission and bent on expanding its frontiers through conquest and exclusionary borders. The U.S. Army that moved into Comanchería was an adversary unlike any Comanches had encountered.
The invasion began from Texas, the state with the longest list of grievances against the Comanches. Comanche raids had taken a heavy toll in Texan lives and livestock since the late 1850s, stunting the state’s projected economic growth. Blocked by a wall of Comanche violence, the expanding Texas cattle kingdom had bypassed the Great Plains, extending instead toward less desired regions in New Mexico and the Rocky Mountains. By 1871, Texans considered the situation intolerable.