The first Mongol invasions of Burma (present-day Myanmar) (Burmese: မွန်ဂို–မြန်မာ စစ် (၁၂၇၇–၁၂၈၇)) were a series of military conflicts between Kublai Khan's Yuan dynasty, 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.