Sithu Kyawhtin
Sithu Kyawhtin was the last king of Ava from 1551 to 1555. He came to power by overthrowing King Narapati III in 1551, the culmination of his six-year rebellion with the support of the Shan state of Mohnyin.
As king, he was able to get all members of the Confederation of Shan States to unite against an impending invasion by King Bayinnaung of Toungoo Dynasty. He sought a peace treaty with Bayinnaung but was rebuffed. The Ava-led Confederation withstood the initial invasion by Toungoo in 1553 but could not stop a larger invasion a year later. The fallen king spent his remaining years in an estate at Pegu. He repaid the good treatment by suppressing the 1565 rebellion at the capital while Bayinnaung was away in Chiang Mai. He was given many honors by Bayinnaung.
Background
Little is known about the background of this king. According to the chronicle Zatadawbon Yazawin, he was an ethnic Burman. But colonial period historians Arthur Purves Phayre and G.E. Harvey called him an ethnic Shan. Phayre went as far to say that he was a son of Sawlon I of Mohnyin, the conqueror of Ava. Neither historian provided citations for their assertions however. The standard Burmese chronicles Maha Yazawin and Hmannan Yazawin only say that Sithu Kyawhtin was a thwethauk brother of Sawlon II of Mohnyin.Governor of Salin
Even if he was not biologically related to the ruling clan of the Shan state of Mohnyin, the chronicle accounts clearly show that Sithu Kyawhtin was a close ally of Mohnyin. In the 1530s, during the reign of King Thohanbwa of Mohnyin, Sithu Kyawhtin was governor of Salin, a strategic city on the Irrawaddy about 250 km south of Ava. That King Narapati of Prome in the late 1530s sent his sister Salin Mibaya to Sithu Kyawhtin in marriage of state shows that Sithu Kyawhtin was probably a powerful figure in Thohanbwa's administration. Sithu Kyawhtin contributed to Ava's war effort against Toungoo but lost his city to advancing Toungoo forces in 1544. In the following dry season campaign of 1544–45, he was able to retake Salin briefly but his small army of 3000 men was eventually defeated by larger Toungoo forces. He barely escaped, fleeing west alone by himself to the Chin Hills, which then were controlled by the Shan state of Kale, a vassal of Mohnyin. At the Chin Hills, he was found by local chiefs who sent him to the saopha of Kale, who in turn sent him to Mohnyin.Ruler of Sagaing
Vassal of Mohnyin
At Mohnyin, Sithu Kyawhtin became a central figure in his thwethauk brother Sawlon II's plan to overthrow King Hkonmaing at Ava. The ruler of Mohnyin had been deeply dissatisfied with Hkonmaing, who was put on the Ava throne by the court in 1542 after Thohanbwa was assassinated. Sawlon II believed the throne of Ava rightfully belonged to Mohnyin since it was his father Sawlon I who led the Confederation of Shan States to the victory over King Narapati II of Ava in 1527, and it was his elder brother Thohanbwa who ruled Ava between 1527 and 1542. But Sawlon II along with other chiefs of the Confederation reluctantly agreed to Hkonmaing as the new king of Ava because of the impending Toungoo threat. However, after successive military defeats that allowed the Toungoo takeover of central Burma to Pagan, Sawlon II had enough of Hkonmaing's leadership. In April/May 1545, he sent Sithu Kyawhtin with an army to overthrow Hkonmaing.Sithu Kyawhtin and his army took over Sagaing, the city on the left bank of the Irrawaddy right across from Ava, but could not take a heavily fortified Ava. The rump Ava Kingdom had now further split into two halves: the Mohnyin-controlled west of the Irrawaddy, and Hsipaw/Onbaung-controlled eastern half. The two halves remained at war even after Hkonmaing's death c. September 1545. With a closer enemy massed across the river, the new king of Ava, Narapati III immediately sued for peace with Toungoo, and ceded central Burma to Toungoo in exchange for peace.
With his southern border secure, Narapati III tried to regain control of Sagaing. He first sent a mission to Sithu Kyawhtin to submit, which was refused. He then attacked Sagaing, which was repelled. Meanwhile, Sithu Kyawhtin proved to be an able ruler and gained the support of the populace in the region. He even released prisoners of war after treating them of their wounds, allowing them to go wherever they pleased. Many came over and joined his forces. Over the next few years, he became a powerful ruler in his own right.
Independent ally of Mohnyin
Sithu Kyawhtin's popularity and increasingly independent policies were seen as a threat by his hitherto overlord Sawlon II. Circa 1548/49, Sawlon II marched to Sagaing only to see that his nominal vassal was now in much stronger position. The two thwethauk brothers met near the Ponnya Shin Pagoda near Sagaing, and amicably worked out the differences. Sawlon agreed to withdraw. The two rulers remained allies.Takeover of Ava
Sithu Kyawhtin renewed the war with Ava in September 1551. He may have been prompted into action by the new Toungoo king Bayinnaung's campaigns to restore the Toungoo Empire. Indeed, Bayinnaung and his forces attempted to invade Upper Burma in late September while Sithu Kyawhtin's Sagaing forces were laying siege to Ava. But Toungoo forces decided to deal with Pegu first, and pulled back. Soon after, King Narapati III gave up, and fled south to join Bayinnaung.King of Ava
Consolidation and war preparations
Sithu Kyawhtin ascended to the Ava throne as Narapati IV. It was circa October 1551. Knowing that Bayinnaung would return, he immediately set out to secure the alliance of all Confederation states, including those of Onbaung–Thibaw, the native state of Narapati III and of Mohnyin. Facing an existential threat, the Confederation states pledged their full support, sending troops, food and arms in preparation for the invasion from the south. He also tried diplomacy, hoping that he could avoid a war. In the dry season of 1552–1553, an Ava embassy led by the governor of Saga Taung arrived at Pegu where they were politely received by the Pegu court led by ministers Binnya Dala and Daw Binnya. The Ava mission stayed there for three months but returned empty handed without a peace treaty.War with Toungoo
Sithu Kyawhtin now fully expected war, though it came sooner than he expected. On 14 June 1553, Bayinnaung sent two 7000-strong armies led by Crown Prince Nanda and Minkhaung II of Toungoo to invade Upper Burma. By launching a campaign in the rainy season, the Toungoo command may have hoped to secure the element of surprise. But Sithu Kyawhtin had enough reserves who held off the invasion force at Tada-U until his allies came to his aid with 12,000 men. Toungoo forces facing rainy season conditions retreated.The respite lasted for a little over a year. In November 1554, Toungoo forces launched a two-pronged invasion, one up the Sittaung valley and the other up the Irrawaddy valley. Avan defenses, supported by nine Confederation armies from, could not stop the advance, and the capital Ava fell to the southern forces on 22 January 1555. Sithu Kyawhtin and his five servants in disguise slipped out of the city, and fled east to join the Onbaung saopha's forces but were captured en route at Mekkhaya. The fallen king was subsequently sent to Pegu to live in exile.