Karen people is a minority race.but under the British colonial rule.They were the ruling classes.Christian.The minority people ruling the majority people.It's usual and simple way of skillful domination at the colony.but now Karen people sending a sever living at mountain area.They operate to use rather long folding hand knives and saws to cut off no good part of leg.Probably not using to take pain off medicine.without anesthesia.The japanese royal army did.it's same way.same method.
http://www.youtube.com/watch?v=l-YVdpQHdqo
http://www.youtube.com/watch?v=l-YVdpQHdqo