The Burmese–Siamese War (1759–1760) (Burmese: ယိုးဒယား-မြန်မာစစ် (၁၇၅၉–၁၇၆၀); Thai: สงครามพม่า-สยาม (พ.ศ. 2302–2303)) or Alaungpaya's War (Thai: สงครามพระเจ้าอลองพญา) was the military conflict between the Konbaung dynasty of Burma (Myanmar) and the Ban Phlu Luang Dynasty of the Ayutthaya Kingdom of Siam, in which the Burmese forces under King Alaungpaya of the Konbaung dynasty invaded Siam. After about a century of relative hiatus of Burmese–Siamese conflicts, this war reignited the new round of military conflicts between Burma and Siam that would last for about a century to come.
After the fall of Burmese Toungoo dynasty at the hands of the Mons of Hanthawaddy in 1752, the Burmese resurged powerful under King Alaungpaya who founded the new Konbaung dynasty in 1752. In the course of Burmese reunification, Burmese forces under charismatic leadership of Alaungpaya had gained military experiences, including expulsion of the British and the French from Lower Burma. Burma reconstituted into a militarized polity, whereas Siam, centered on Ayutthaya, had not faced any serious external threats or military conflicts since late seventeenth century and Siamese defense system had been largely in disuse. Siam, through the eighteenth century, had been plagued with internal rebellions, succession disputes and decline of manpower control. Chronic manpower shortage undermined Siamese defense system.
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