Around 1759, King Ekkathat of Ayutthaya appointed Phraya Ratchasuphawadi as the governor of Nakhon Si Thammarat and also named Luangsit Naiwen as the vice-governor with the title of Phra Palat.
Phra Palat Nu, who had been in charge of Nakhon Si Thammarat, which was the Mueang Ek or administrative center of Southern Siam, declared himself an independent lord.
In 1769, King Taksin of Thonburi initiated his campaign to subjugate the Southern Siamese regime of Ligor as a part of his reunification of Siam.
The royal forces defeated the Ligorians at Thamak and proceeded to lay siege on Nakhon Si Thammarat.
It is said that King Taksin sent his agent to secretly meet with Chan, urging him to defect and switch side.
[4] The battle occurred at Tha Pho in the northern outskirts of Ligor, in which Chan was defeated and captured.
Nakhon Nu took his family, including his daughters and his son-in-law Prince Phat, to seek refuge at Songkhla.
Nakhon Nu and his family were initially placed under house arrest inside the Thonburi city wall.
King Taksin elevated Consort Chim, Nakhon Nu's daughter, to the position and title of Queen Krom Boricha Phakdi Si Sudarak (Thai: กรมบริจาภักดีศรีสุดารักษ์).
In 1777, Nakhon Nu proposed to King Taksin to conduct a campaign to subjugate the Northern Malay Sultanates.
Nakhon Nu maintained male court dancers, which would later evolve to become the Menora dance of modern Southern Thailand.
[10] Chaophraya Nakhon Nu did not cooperate with the new Bangkok government in the Sak Lek or conscription of Southern Siamese people.
[3] Nakhon Nu presumably lived last years of his life in custody in his residence in Ban Kruay in Bangkok.