Yakin Burma-Siamese (1765-1767), wanda kuma aka fi sani da faduwar Ayoudhia shi ne rikicin soja na biyu tsakanin daular Konbaung na Burma (Myanmar) da daular Ban Phlu Luang na daular Ayutthaya ta Siam, da yakin da ya kare. Masarautar Ayutthaya mai shekaru 417.^[62] <> Duk da haka, ba da jimawa ba an tilasta wa Burma yin watsi da nasarorin da suka samu a lokacin da China ta mamaye ƙasarsu ta tilasta janyewa gaba ɗaya a ƙarshen 1767. Sabuwar daular Siamese, wadda masarautar Thai ta yanzu ta samo asali. ya fito don sake hade Siam a shekara ta 1771. ^[63]Wannan yakin shine ci gaba da yakin 1759-60.Kazalika na wannan yaki shi ne iko da gabar Tenasserim da kasuwancinsa, da kuma goyon bayan Siamese ga 'yan tawaye a yankunan iyakar Burma.^[64] An fara yakin ne a watan Agustan 1765 lokacin da sojojin arewacin Burma mai dakaru 20,000 suka mamaye arewacin Siam, kuma sojojin kudanci uku na sama da 20,000 suka hade da shi a cikin watan Oktoba, a wani yunkuri na pincer a Ayutthaya.Ya zuwa ƙarshen Janairu 1766, sojojin Burma sun sami nasara a adadi mai yawa amma ba su da tsarin tsaro na Siamese mara kyau, kuma sun haɗu a gaban babban birnin Siamese.^[62]An fara killace Ayutthaya ne a lokacin farmakin farko da Sinawa suka yi wa Burma.Siamese sun yi imanin cewa idan za su iya tsayawa har zuwa lokacin damina, ambaliya ta yanayi ta tsakiyar yankin Siamese zai tilasta ja da baya.Amma sarki Hsinbyushin na Burma ya yi imanin cewa yakin China ƙaramin rikici ne na kan iyaka, kuma ya ci gaba da kewaye.A lokacin damina na shekara ta 1766 (Yuni-Oktoba), yakin ya koma ruwa na filin da aka yi ambaliya amma ya kasa canza matsayin.^{[62 <]} > Lokacin da lokacin rani ya zo, Sinawa sun kai hari mafi girma amma Hsinbyushin ya ƙi tunawa da sojojin.A cikin Maris 1767, Sarkin Ekkathat na Siam ya yi tayin zama mai gayya amma Burma ya bukaci mika wuya ba tare da wani sharadi ba.^[65] A ranar 7 ga Afrilu 1767, Burma ya kori birnin da ke fama da yunwa a karo na biyu a tarihinta, inda suka aikata ta'addanci da ya bar babban baƙar fata ga dangantakar Burma da Thai zuwa yau.Dubban mutanen Siamese da aka yi garkuwa da su sun koma Burma.Aikin Burma bai daɗe ba.A cikin watan Nuwamba na shekara ta 1767, Sinawa sun sake kai hari tare da mafi yawan sojojinsu, a karshe suka shawo kan Hsinbyushin ya janye sojojinsa daga Siam.A yakin basasa da ya biyo baya a Siam, jihar Siame ta Thonburi karkashin jagorancin Taksin ta samu nasara, inda ta yi galaba a kan sauran jihohin Siamese da suka balle tare da kawar da duk wata barazana ga sabuwar mulkinsa a shekara ta 1771. ^[66] Burma, duk tsawon lokacin, sun kasance sun kasance a cikin yakin basasa. ya shagaltu da kayar da mamayar kasar Sin ta hudu a Burma a watan Disamba na shekara ta 1769.A lokacin, wani sabon takun saka ya kama.Burma ta mamaye Tekun Tenasserim na ƙasa amma kuma ta kasa kawar da Siam a matsayin mai ɗaukar nauyin tawaye a iyakokinta na gabas da kudanci.A cikin shekaru masu zuwa, Hsinbyushin ya damu da barazanar Sinawa, kuma bai sake sabunta yakin Siamese ba sai 1775 - kawai bayan Lan Na ya sake yin tawaye tare da goyon bayan Siamese.Jagorancin bayan Ayutthaya Siamese, a cikin Thonburi kuma daga baya Rattanakosin (Bangkok), ya tabbatar da abin da ya fi dacewa;sun yi galaba a kan mamayar Burma guda biyu na gaba (1775-1776 da 1785–1786), kuma sun mamaye Lan Na a cikin wannan tsari.