Thus, Nang Pim and plai-Keo were married. However, this did not prevent Khun Chang from trying to get her for himself His opportunity came when the king's tributary state, Chiengtung, was invaded by Chiangmai and the king decided to send troops to Chiangmai in retaliation The king needed a man to lead the expedition To get rid of Plai keo, Khun Chang advised the king that Plai Keo, the son or the king's former warrior, was the ideal choice for the post, since he was known to be very brave. The king agreed, and thus Plai Keo was sent off to war.