The Burmese–Siamese War (1775–1776) or Maha Thiha Thura's Invasion of Siam or Athi Wungyi's War (Thai: สงครามอะแซหวุ่นกี้) was a major military conflict between the Konbaung dynasty of Burma (now Myanmar) and the Thonburi Kingdom of Siam (now Thailand).