How Muay Chaiya is different from Modern Thai Boxing ?

Muay Chaiya was created in the ancient battlefields, when warriors still fought using sharp weapons and, in the event of being disarmed,body parts.As such, it is based on time-tested techniques and principles that were aimed at 1) ending engagements in the swiftest and surest manner2) using minimal energy3) ensuring that the learnt practitioner was least, if at all, hurt. That certainly is not