Siege of Ngasaunggyan

Date: December 3, 1283 • Location: Dehong Daizu Jingpozu Zizhizhou, China

This milestone marked the outbreak and beginning of this historic period, which spanned 1283–1285.

During the First Mongol invasion of Burma, the fort at Ngasaunggyan was overrun after a two-month siege.

The first Mongol invasion of Burma was a series of military conflicts between Kublai Khan's Yuan dynasty, a division of the Mongol Empire, and the Pagan Empire that took place between 1277 and 1287. The invasions toppled the 250-year-old Pagan Empire, and the Mongol army seized Pagan territories in present-day Dehong, Yunnan and northern Burma to Tagaung. The invasions ushered in 250 years of political fragmentation in Burma and the rise of ethnic Tai-Shan states throughout mainland Southeast Asia.