The Thai monarchy, caring for the welfare of all involved, started a program for poppy growers to have income from other crops and industries beside opium. Thai soldiers in the region asked local monks to combat the drug menace by taking dharma (duty to behave righteously) to the hilltribe villagers. One monk was Kru Ba, a former soldier and Muay Thai (Thailand style martial arts) champion, known to boxing fans as Samerchai, and graduate of Ramkamhaeng University in Bangkok. To serve his land better, he became a monk. Another Thai man who wanted to do good gave the monastery a horse. Kru Ba took in more horses and orphaned hilltribe boys, and ordained the boys as nen (novice monks). Many of the nen had seen their families murdered by drug guerillas. Kru Ba taught the nen discipline, calisthenics, caring for the horses and other living things, the life of doing and saying good, and Muay Thai martial arts.
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http://www.healthline.com/blogs/exercise_fitness/2007/03/muay-thai-monks-on-horseback.html#ixzz1INzFjoQP