THE AVA AND PEGU (c. 1364-1555)
After the collapse of Pagan authority, Myanmar was divided. A Burman Ava Dynasty (1364-1527) was eventually established at the city of Ava by 1364. Pagan culture was revived and a great age of Burmese literature ensued. The kingdom lacked easily defendable borders, however, and was overrun by the Shan in 1527.
To the south in Lower Burma, a Mon dynasty established itself first at Martaban and then at Pegu. During the reign of king Rajadhirat (1383–1421) Ava and Pegu were involved in continuous warfare. The peaceful reign of Queen Baña Thau (Burmese: Shin Saw Bu;1453-72) came to an end when she chose the Buddhist monk Dhammazedi (1472-92) to succeed her. Under Dhammazedi Pegu became a centre of commerce and Theravada Buddhism.
The Kingdom of Ava was involved in continuous warfare with Tai (Shan) princelings to the north on the frontier with Yunnan. There were repeated Tai raids on the capital of Ava and Ava sent military northwards to attack Tai fiefdoms such as Mong Mao. The Ming dynasty that ruled China from the late fourteenth century often tried unsuccessfully to put an end to this warfare through traditional Chinese diplomacy. Ava occasionally became involved in the warfare between the Ming and Tai in Yunnan such as in the Luchuan-Pingmian Campaigns (1436-49).