Khmer boxing, also known as Pradal Serey or Kun Khmer, is one of the many ancient martial arts of South East Asia. These martial arts are believed to originate from the Kingdom of Funan, thus preceding the first Khmer Empire. That is why Predal Serey, Tomoi, Muay Thai, Lethwei and Muay Lao share so many similarities regarding stances and techniques.