Though he opportunistically renewed the Forty Years' War with Hanthawaddy Pegu in 1422, Thihathu agreed to a peace treaty with Prince Binnya Ran in 1423.

Born c. 3 June 1394,[note 1] Minye Thihathu (မင်းရဲ သီဟသူ) was the third child of Prince Min Swe of Pyinzi and Princess Shin Mi-Nauk.

[2][3] His father was a son of then King Swa Saw Ke of Ava while his mother was a daughter of Sawbwa (Chief) Tho Ngan Bwa (Si Lun Fa) of Mohnyin.

[5][6] Thihathu grew up in Ava amidst the Forty Years' War with the southern Mon-speaking kingdom of Hanthawaddy Pegu.

He became second in line to the Ava throne c. December 1406 when his elder brother Minye Kyawswa was appointed crown prince.

This prompted their uncle Prince Theiddat of Sagaing, who was instrumental in placing Minkhaung on the throne and had considered himself heir apparent, to defect to Pegu in 1407.

After the death of Theiddat c. July 1408, Minkhaung appointed his middle son governor of Sagaing, the capital of the northern province.

Though Thihathu was governor of Sagaing, when China and her client Shan states began raiding Ava's northern territories, it was Minye Kyawswa that Minkhaung recalled to face the enemy in 1412 and again in 1413.

First, his naval convoy protecting Ava supply lines was driven back in the Irrawaddy delta by Prince Binnya Bassein.

The ensuing indiscriminate looting and deportations of townfolk by the Ava troops greatly angered Kyan, who soon reached a deal with his older brother Dhammaraza drive out the northerners.

[23][24] Prome's southernmost district Tharrawaddy (Thayawadi) fell to Prince Binnya Ran, another pretender to the Hanthawaddy throne.

(The nominal king Dhammaraza controlled only around the capital Pegu while Kyan had just moved to Martaban (Mottama) as viceroy of the eastern province.

[24]) Ava troops went on occupy the delta, taking Khebaung, Bassein (Pathein), and Dala in succession, and laid siege to Dagon where Ran was based.

[25][26] A month into the siege, Ran offered his full sister Princess Shin Saw Pu in a marriage alliance, and renounced his claim to Tharrawaddy.

[27] Thihathu readily accepted the offer, and came down by the royal barge surrounded by another 7000 troops to Dagon to formalize the treaty with Ran.

Le Than Bwa of Onbaung (Hsipaw/Thibaw) with a sizable force ambushed Thihathu at Aung Pinle (modern Amarapura, Mandalay), the location Bo-Me had provided.

[note 5] Having suffered a violent death, Thihathu entered the Burmese pantheon of nats as Aung Pinle Hsinbyushin.

As a nat, He is portrayed sitting cross-legged on a throne on elephantback in full regalia, with one of the elephant attendants crouching in front and another on horseback wielding a sword.