Muay Thai Kickboxing is the National sport of Thailand.
But Muay Thai history is somewhat of a mystery.
Thai history and that of the early writibgs of Muay Thai were destroyed by the Burmese army when they destroyed Ayuddhaya.
However, there is eveidence showing that during the time of King Naresuan both himself and his soldiers where trained in the art of Muay Thai.
Fighting Strategies of Muay Thai : Secrets of Thailand's Boxing Camps
Paralumun New Age Village