Pagan Kingdom
The historical relevance of the Shan states inside the present-day boundaries of Burma increased during the period of the Pagan Kingdom in the Shan Hills and Kachin Hills and accelerated after the fall of the Pagan Kingdom to the Yuan dynasty in 1287. The Shans, including a new migration that came down with the Mongols, quickly came to dominate an area from northern Chin State and northwestern Sagaing Region to the present-day Shan Hills. The newly founded Shan States were multi-ethnic states that included a substantial number of other ethnic minorities like the Chin, Palaung, Pa-O, Kachin, Akha, Lahu, Wa and Burmans. The most powerful Shan states were Mohnyin (Mong Yang) and Mogaung (Mong Kawng) in present-day Kachin State, followed by Theinni (Hsenwi), Thibaw (Hsipaw), Momeik (Mong Mit) and Kyaingtong (Keng Tung) in present-day northern Shan State.