27 November 1868, a detachment of US troops under the command of General Custer ignored orders to kill only warriors and massacred 103 sleeping Cheyenne in the so-called "Battle of the Washita".
Cheyenne chief Black Kettle had requested permission from US colonial authorities to move his village near to Fort Cobb for protection. The request was refused, but Black Kettle was reassured that if his men stayed in their villages, they would not be attacked. Just before dawn the following morning, while most of the village were asleep, the US Army attacked the village. General Custer had ordered his troops "to destroy their villages and ponies, to kill or hang all warriors, and bring back all women and children."
Black Kettle awoke when the attack began and lifted his hand to give a gesture of peace. He and his wife were shot dead, and their bodies ridden over by horses.
In just a few minutes, the village was destroyed and hundreds of horses were shot. Rather than separate warriors, the soldiers massacred 103 people, only 11 of whom were warriors, the others being women and children. They also took 53 women and children hostage.
Hearing gunfire, a detachment of Arapaho warriors came to the aid of the Cheyenne, as did some Kiowa and Nʉmʉnʉʉ (Comanche). These fighters encountered and wiped out a detachment of 17 US troops.
At this point the US army withdrew with its captives. Custer was later killed by Cheyenne, Arapaho and Lakota warriors in the Battle of the Little Bighorn."
