Hsinbyushin of Burma has never abandoned his plan to force Siam to its knees, and as soon as he had been informed of the foundation of Thonburi as King Taksin's capital in late 1767, he had commanded the Governor of Tavoy to subjugate Taksin.

The Burmese army had advanced to the district of Bangkung in the province of Samut Songkram to the west of the new capital, but was routed by the Thai king himself.

However, when the Chinese troops invaded, Hsinbyushin had decided to call most of his troops back to resist the Chinese.

After the conclusion of peace with China, the Burmese king sends another small army of five thousand to attack Siam in 1774, but it is completely surrounded by the Thais at Bangkeo in Ratchaburi and eventually starvation compels the Burmese to capitulate to Taksin.