Mohnyin Thado was king ofAva from 1426 to 1439. The ethnic Burmansaopha of Mohnyin came to power after overthrowing King Kale Kye-Taung Nyo and his queen Shin Bo-Me in 1426. His reign marks the plateauing of Ava's power. Left exhausted by the Forty Years' War with Hanthawaddy Pegu in the south, and long-running wars against various Shan States in the north, Ava was no longer in a position to expand. Mohnyin Thado spent his 12-year reign keeping restive regions of Ava in one piece. He never controlled Toungoo. He had to tolerate the governors of other regions who treated him as at best a senior. Hanthwaddy aided the Toungoo rebellion in 1426 and seized the region in 1436. But the two kingdoms did not resume a full-scale war. In 1438, Mohnyin Thado renumbered the Burmese calendar by subtracting two years on the advice of a court astrologer. The change did not stick as he died a year later. King Alaungpaya of Konbaung Dynasty claimed descent from Mohnyin Thado.
When Minkhaung became king in 1400, he brought his young attendants to court. In 1406, Nansi served under Prince Minye Kyawswa in one of the crucial campaigns against the Hanthawaddy Kingdom in the Forty Years' War. He fought his way into Prome with pack-ponies carrying rice. Having provisioned the garrison, he fought his way out through the Hanthawaddy lines. Minkhaung was so pleased with Nansi's wartime performance that in 1410 he made Nansi the Saopha of the Shan State of Mohnyin, and in addition gave the youngster in marriage his queen of five months, Shin Myat Hla, daughter of Thihapate, Lord of Taungdwin. At Mohnyin, he gained the title of "Mohnyin Thado" that he would be known thence. Despite his mainly Burman heritage—he had a small amount of Shan blood as he was a descendant of Kyawswa I of Pinya—he successfully ruled Mohnyin, a restive Shan state which had launched numerous raids into Ava territories for decades.
Accession
In 1426, two successive kings of Ava were assassinated by the designs of Queen Shin Bo-Me, who put her lover Kale Kye-Taung Nyo, the Saopha of Kale, on the throne. Mohnyin Thado refused to submit to the usurpers, and came down with his army to Ava, forcing the usurpers to flee the capital. He became the new king of Ava on 16 May 1426 or 20 May 1426. Nyo later died in the jungle. Queen Bo-Me, a dashing beauty who had already been queen of four kings Tarabya, Minkhaung I, Thihathu and Kale Kye-Taung Nyo, was brought back and made a junior queen of Mohnyin Thado. According to the Burmese Chronicles, when Mohnyin Thado enquired about her health after she was brought back from the forest, she replied insultingly "I think I smell a slave." The king had a residence built for her within the walls of the palace.
Reign
Mohnyin Thado's reign marks the plateauing the Ava Kingdom, though it was not of his making. After the Forty Years' War with Hanthawaddy Pegu in the south, and long-running wars against various Shan States in the north, Ava by Mohnyin Thado's reign was thoroughly exhausted, and no longer in a position to expand. Unlike his predecessors Swa Saw Ke and Minkhaung who launched the wars, Mohnyin Thado spent his 12-year reign keeping restive regions of Ava in one piece. Taungdwingyi, Yamethin, Pinle, and above all Toungoo, under princes of much the same standing as himself went their own way and treated him as best a senior.
Toungoo rebellion (1426–1440)
He found it difficult to control the mainly Burman region of Toungoo, over which Ava had only nominal suzerainty. When Thinkhaya, the ruler of Toungoo, came to Ava in 1426, he was treated almost as equal by Mohnyin Thado. Mohnyin Thado tried to encircle Toungoo by making his brother the governor of Tharrawaddy, an adjacent region of Toungoo, and staying on good terms with King Binnya Ran I of Hanthawaddy. Nonetheless, Thinkhaya formed an alliance with Binnya Ran, decided to raise a rebellion and laid siege to Prome. However Binnya Ran simply wanted to keep Ava occupied, and was not eager to restart a war with Ava. He sent envoys to Ava, asking for a princess of Ava as the price of alliance. Mohnyin Thado was so angry that he kept the envoys for three months without audience, and had to be dissuaded from killing them. He finally decided to ally with Hanthawaddy and gave his niece to the Hanthawaddy king. Toungoo remained out of his reach for the rest of his reign.
Other regions
Mohnyin Thado did not have much authority over other regions of the kingdom either. The rulers of regions as close to Ava such as Yamethin and Pinle, which controlled the all important Kyaukse granary behaved like sovereigns. Pinle was ruled by Minye Kyawhtin, son of the famous warrior prince Minye Kyawswa. On top of that, Shan raids continued. The Shan state of Hsipaw attacked Myedu and the northern frontier in Shwebo district, and even for eight months drove him out of his palace, withdrawing only on payment of a large sum.
When he came to power, he took Shin Sawbu, who was a queen of Thihathu of Ava and the elder sister of Binnya Ran I of Hanthawaddy, from the lord of Pagan to whom she had been given after Thihathu was assassinated. As Mohnyin Thado bestowed his affections elsewhere, Shin Sawbu planned to flee Ava. In 1430, she fled Ava with the help of two ethnic Mon monks who were studying in Ava. At Pegu, her brother Binnya Ran received her with great honors.
In 1430, two monks returned from Ceylon with five relics. The king built the monks a huge monastery two miles west of Sagaing, and nearby a pagoda named Yadanazedi, now called Payabyu, to enshrine the relics.
In 1438, at the turn of Burmese calendar year 800, Mohnyin Thado on the advice of a court astrologer decided to renumber the calendar by subtracting two years. When the monks cautioned him that kings who alter the calendar die, he said "If I must die, let me die. I will not be put in a song as a king who was afraid to do his duty". The king died just over a year later, and his change of the calendar was discarded. He was succeeded by his son Minye Kyawswa.
