During the Warring States Era all that ended. Something on the order of hundreds of thousands of troops were fielded in battle. These troops were untrained peasants and had a difficult time killing. Maimed and crippled survivors across the region became dependent on their families for basic care. In response to this problem easy to remember death points were invented and taught widely. As a way to make sure that the suffering on the battlefield stayed on the battlefield; soldiers were offered a quick compassionate death.