First Mongol invasion of Burma
The first Mongol invasions of Burma (Myanmar) (; ) were a series of military conflicts between the Mongol-led Yuan dynasty of China, 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.