[1] In the following two years, as the Qing extended their control over northern China, Zhu Youlang, the last emperor of the Southern Ming dynasty and the remaining Ming loyalists attempted to regroup in the south, In late January 1659, a Qing army led by Manchu prince Doni took the capital of Yunnan, sending the Yongli Emperor fleeing into nearby Burma, which was then ruled by King Pindale Min of the Toungoo Empire.

Given the nature of the situation, King Narai abandoned his plans to conquest Lan Na and ordered his expeditionary force to return home.

[4] Concurrent with the withdrawal of the Manchu from Burma and the return home of the Siamese from Lan Na, a revolution was taking place in the Toungoo capital, Ava.

Sensing the unrest in the Toungoo Empire and a renewed opportunity to take control of Lan Na, King Narai prepared his armies and marched them north in December 1662.

[6] Ultimately King Narai and two Siamese armies invaded Lan Na and captured Chiang Mai in February 1663 before support from the Toungoo Empire was able to arrive.

King Narai quickly established the administrative rules for Lan Na as a suzerain of Siam, gathered the war booty, and returned home.

Although, King Narai ordered his military to remain in Chiang Mai and enforce the administration of the country, he did very little else to maintain the ascendancy of Siam in Lan Na.

[7][8] Meanwhile in the Tenasserim coastal region, the Burmese were arresting and threatening to execute the Mons who had been conscripted to help defend against the Chinese invasion but failed to report for duty.

[17][18] Thai statesman, historian, and author, Prince Damrong Rajanubhab examined the campaign histories of both Burma and Siam along with the account of the Mon.

)[20] For the record, Rajanubhab claims the Siamese invasion force overwhelmed the Burmese with their numerical superiority and easily completed their initial objectives then moved on to capture the cities of Chittagong, Syriam, Rangoon, Hongsawadi, and Prome.