The Battle of Maymyo, fought in March 1768, was the final battle and the end of the Third Qing Invasion of Burma during the Sino-Burmese War (1765–69). In November 1767, the Qianlong Emperor ordered the Third Invasion under the command of his son-in-law Mingrui with a 50,000-strong invasion force led by the Manchu Bannermen after the failure of the Green Standard Army and Yunnan Border troops in the earlier invasions. They were the most successful of the invasions penetrating deep into central Burma and defeating the main Burmese army at the Battle of Goteik Gorge. However, Mingrui ended up overstretching his lines by the time he reached Ava. Burmese reinforcements arrived from Siam and began cutting the Qing supply lines. Hounded by Burmese guerrilla attacks, his men suffering from tropic