The Burmese–Siamese War (1759–1760) (; ) was the first military conflict between the Konbaung Dynasty of Burma (Myanmar) and the Ban Phlu Luang Dynasty of Siam (Thailand). It reignited the centuries-long warfare between the two states that would go on for another century. The Burmese were "on the brink of victory" when they suddenly withdrew from their siege of Ayutthaya because their king Alaungpaya had fallen ill. He died three weeks later, ending the war.