The Kiowas were part of the Medicine Lodge Treaty of 1867 and were assigned a reservation in Oklahoma in 1868. They never really confined their activities to the reservation, however, and in 1874 resumed warfare with the white settlers in the vicinity.
Technological advances in the arms and artillery in the era of the Civil War resulted in high numbers of casualties on both sides. That´s why many battles of the war were military stalemates but supposed horrendous carnage.