Background
He was a son of King Saw O and Princess May Hnin Htapi of Sukhothai.
He was a son of King Saw O and Princess May Hnin Htapi of Sukhothai.
The powerful queen had ousted usurper Zein Pun, who reigned for seven days. After a few months, the queen poisoned the young king, and placed her half-brother Binnya East Law, viceroy of Pegu, to the throne. (She again made herself the chief queen)
The murder of Saw East greatly angered the king of Sukhothai as Saw East was a grandson of his.
Sukhothai forces invaded but were defeated.
From then on, Hanthawaddy threw off its nominal vassal status to Sukhothai.