actaually they said the ruler at that time( i forget who it was)used them to signal his troops and tell them what he wanted them to do
they were trained to kiell what or whom ever was near where the arrow landed
in training we shot one of these arows at his pack of prize hunting dogs to see what his troops would do
some went over and killed the dogs,others didnt and they in turn were killed for not killing the dogs as they were trained to do
he later shot one where his father was standing to see what his troops would do
they all went over and killed his father,they were tha well trained and that afraid of their leader.