The idea of full dress in preparation for a battle comes not from a belief that it will add to the fighting ability. The preparation is for death, in case that should be the result of the conflict. Every Indian wants to look his best when he goes to meet the Great Spirit, so the dressing up is done whether in imminent danger is an oncoming battle or a sickness or injury at times of peace.
"Wooden Leg: A Warrior Who Fought Custer".