He was merely a nominal king, and could not consolidate his power in the wake of the devastating raid by the northern Shan state of Mong Mao.
Uzana was the eldest child of Princess Nan Lon Me of Pagan and Prince Kyawswa of Pinle.
In May 1364, the raiders from the northern Shan state of Mong Mao (Maw) sacked Pinya, and took away Narathu, along with the loot.
The Maw Shan raids had left the entire Central Burma, including Pinya's neighboring Sagaing Kingdom, in tatters.
Unlike Uzana II, Thado Minbya proved to be an able leader, and quickly consolidated his power at Sagaing.
In September 1364, Thado Minbya and his army crossed the Irrawaddy, and seized Pinya, apparently without a fight.