The Thai were on constant guard against attack from neighboring countries, including Burma and Cambodia. Enemies for centuries, the Burmese and Thai fought several wars wreaking destruction on both countries. Muay Thai was primarily a part of the Thai culture during this period and was a mandatory training as part of the Thai military of that time. The military continued to train soldiers for centuries in the art of Muay Thai: defining, and refining the skills, tactics, and techniques with the wars against the Burmese, Cambodians, and other invaders.