The Battle of Ngasaunggyan was fought in 1277 between Kublai Khan's Yuan Dynasty of Mongol Empire, and their neighbors to the south, the Pagan Empire (in present-day Burma) led by Narathihapate.
The Burmese king Narathihapate, who fled Pagan to Lower Burma, prior to the battle, and the Burmese defense collapsed.
The first invasion defeated the Burmese at the battle of Ngasaunggyan in April 1277, and secured their hold of Kanngai (modern-day Yingjiang, Yunnan, 112 km north of Bhamo).