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Burmese-Siamese War (1785)

Burmese–Siamese War (1785–1786)
Part of the Burmese–Siamese wars
Date January 1785 – January 1786
Location Southern and western Siam, Lan Na
Result Siamese victory
Territorial
changes
Siam consolidates control of Chiang Mai, and gains control of Chiang Saen
Belligerents
Konbaung Dynasty (Burma) Rattanakosin Kingdom (Siam)
Commanders and leaders
Bodawpaya
Minkhaung Kyaw
Rama I Maha Sura Singhanat Anurak Devesh
Prince Kawila
Units involved

Royal Burmese Army including:

Shan regiments
Mon regiments
Royal Siamese Army
Strength
144,000 70,000
Casualties and losses
~70,000 ~15,000

Royal Burmese Army including:

The Burmese–Siamese War (1785–1786), known as the Nine Armies' Wars in Siamese history because the Burmese came in nine armies, was fought between the Konbaung dynasty of Burma and the Chakri dynasty of resurgent Siam (Thailand).

In early 1785, King Bodawpaya of Konbaung dynasty sent an expedition force to take Jung Ceylon (Phuket) to prevent foreign arms shipments to Siam but the invasion force was driven back. In October 1785, Bodawpaya pursued an ambitious campaign to expand his dominions into the lands of the former Ayutthaya Kingdom. He launched a four-pronged invasion towards Chiang Mai, Tak, Kanchanaburi, and Jung Ceylon. The combined strength was about 50,000 men. The invasion forces had faced tough heavy resistance from the Siamese forces and finally the war become a total disaster of the Burmese armies. The defeat that the invasion turned out to be the last full-scale invasion of Siam by Burma.

In mid-October 1785, King Bodawpaya armies attacked Lanna in northern Siam, where Kawila, Prince of Lampang, put up a brave fight and delayed the Burmese advance, all the while waiting for reinforcements from Bangkok. When Phitsanulok was captured, Anurak Devesh the Rear Palace, and Rama I himself led Siamese forces to the north. The Siamese relieved Lampang from the Burmese siege.


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