Im guessing so they can have fun. There isn't a real answer for this because the person that created the games is no longer alive. But i think they wanted to have fun and they liked to do it. They probably practiced for it like they do today in the Olympics they do right now.<span />
Amasia was on the edge of the Roman empire, and when strabo was born around 64 B.C.
They protect something about taxes and overseers
They were drafted for Vietnam war.
Hope this helps :)