From Battey we learn that in the seventies of the last century the Kiowa
had a police organization designed to prevent the young men from going
on raids that might bring trouble upon the tribe.
... a strong guard of their soldiers were continually watching, day
and night, while in camp, to prevent any such enterprise from being
undertaken. In moving from place to place, these soldiers marched
on each side of the main body, while a front guard went before, and
a rear guard behind, thus preventing any from straggling away.
A corresponding body regulated the buffalo hunt.
The soldiers, going out first, surrounded a tract of country in
which were a large herd of buffalo; and no one might chase a
buffalo past this ring guard on pain of having his horse shot by
the soldiers.[2]