Sam Fang Ken’s tenth son, Prince Chao …
Years: 1442 - 1442
Sam Fang Ken’s tenth son, Prince Chao Joi, refuses to support his brother as king, brings his father to the town of Muang Fang, and initiates a war for the throne of the northern Thai kingdom.
On Sri Sutham Lok’s seizure of Muang Fang, Chao Joi abandons his father and flees to Thoen, there successfully persuading the town’s governor to request support from the southern Thai kingdom of Ayutthaya.
