Siege of Ayutthaya (1766–1767)

Siege of Ayutthaya (1766–1767)
Part of Burmese–Siamese War (1765–1767)

Modern depiction of the Fall of Ayutthaya in April 1767 at the National Memorial
DateJanuary/February 1766 – 7 April 1767
Location
Result Burmese victory
Territorial
changes
  • Ayutthaya conquered and occupied by the Burmese until November 1767
  • Fall of the Ayutthaya Kingdom
  • Remaining unoccupied Siamese territories descend into civil war
Belligerents
Konbaung dynasty (Burma) Ayutthaya Kingdom (Siam)
Commanders and leaders
Hsinbyushin
Maha Nawrahta #
Ne Myo Thihapate
Nemyo Gonnarat
Mingyi Kamani Sanda
Mingyi Zeyathu
Satpagyon Bo
Thado Mindin
Ekkathat 
Chaophraya Phrakhlang (POW)
Phraya Yommaraj (POW)
Phraya Phollathep (POW)
Phraya Phetchaburi Rueang 
Phraya Tak
Units involved
Royal Burmese Army Royal Siamese Army
Royal Siamese Navy
Strength
40,000+ Around 20,000
Casualties and losses
Heavy 10,000+ killed
30,000 deported
200,000–1,000,000 civilians killed

The siege of Ayutthaya in 1766–1767, also known as the Fall of Ayutthaya and Sack of Ayutthaya, was a part of the Burmese–Siamese War (1765–1767), in which King Hsinbyushin of the Burmese Konbaung dynasty sent his generals Maha Nawrahta and Ne Myo Thihapate to conquer the Siamese Kingdom of Ayutthaya. After conquering and subjugating Siamese peripheral cities, the two Burmese invading columns converged onto and reached the royal city of Ayutthaya in January 1766. Unable to halt Burmese advances at the frontiers, the Siamese were obliged to take defensive positions in the Ayutthaya citadel.

By February 1766, the Burmese laid siege to Ayutthaya and closed in to approach the Ayutthaya city walls in September. Ayutthaya employed traditional defense strategies by relying on the supposed impregnability of its walls and the incoming of the rainy flooding season. The Burmese, however, circumvented these strategies by persisting to stay in rainy season and by the tactics of destroying Ayutthaya city wall at the roots. After fourteen months of enduring the siege, the centuries-old royal Siamese capital of Ayutthaya fell to the Burmese on 7 April 1767 and was completely destroyed, signifying the end of the Ayutthaya kingdom and paving way for subsequent events in Thai history.