Siam vs Burma

Second Burmese Wars

August 1765: 20,000-strong northern Burmese army invade northern Siam, and joined in by three southern armies of over 20,000 in October

January 1766: Burmese armies overcome numerically superior but poorly coordinated Siamese defences, and converge before the Siamese capital.

March 1767: King Ekkathat of Siam offers to become a tributary but the Burmese demands an unconditional surrender.

7 April 1767: the Burmese sacks the starving city for the second time in history.

November 1767: China invades Burma with their largest force yet, finally convincing King Hsinbyushin to withdraw his forces from Siam.

1770: Siamese Civil War; Taksin, King of Thonburi, emerges victor and unites Siam.


1782: King Rama I takes the throne of Siam after defeating a rebellion which had deposed King Taksin of Thonburi. (side note: King Rama established the Chakri dynasty, that still rules Thailand today)

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References:
https://en.wikipedia.org/wiki/Burmese%E2%80%93Siamese_War_(1765%E2%80%9367)
https://en.wikipedia.org/wiki/Chakri_Dynasty
https://en.wikipedia.org/wiki/Rama_I

https://en.wikipedia.org/wiki/Burmese%E2%80%93Siamese_War_(1785%E2%80%9386)