In 1769, King Taksin of Thonburi sent a letter to the pro-Vietnamese King Ang Ton of Cambodia, urging Cambodia to resume sending the submissive tribute of golden and silver trees to Siam. Ang Ton refused on the grounds that Taksin was a Chinese usurper. Taksin was angered and ordered the invasion to subjugate Cambodia and install the pro-Siamese Ang Non on the Cambodian throne. He dispatched the Siamese troops into Cambodia as follows;
