[10] In 1167, Naratheinkha suddenly became the heir apparent to the throne after his father assassinated both Sithu I and Min Shin Saw.
Naratheinkha came to power in 1171 after his father was killed by the assassins sent by the king of Pateikkaya, an Indian kingdom in the west.
[10] This was a significant change because it was the first recorded instance in the history of the dynasty that the king had given up the command of the army.
Naratheinkha supported the new school and sent numerous monks to be re-ordained in Sri Lanka, however, the old order and the schims would last another two centuries.
In 1174, Naratheinkha made up an excuse to send Sithu to the front in the far north at Ngasaunggyan (present-day Yunnan) to suppress a supposed rebellion.
[note 3] Knowing he had been misled, Sithu then selected Aung Zwa, a commander from his army, to lead the effort to assassinate the king.