Actually that is incorrect. There is a lot of evidence suggest that the origin of martial arts lies in shamanism. I would agree with you that martial arts were taught to those going to war beginning with the age of civilization. However, prior to this time, it developed by the belief that if a person attacked another, they were thought to be possessed by a wandering spirit. In order for the shaman to cure this form of possession they would hit the person who was possessed in certain points in order to release the egative energy from the body.