Bayinnaung

Ancestry

The future king was born Ye Htut (ရဲထွတ်, IPA: [jɛ́ tʰʊʔ]) on 16 January 1516 to Mingyi Swe and Shin Myo Myat. His exact ancestry is unclear. No extant contemporary records, including Hanthawaddy Hsinbyushin Ayedawbon, the extensive chronicle of the king's reign written two years before his death, mention his ancestry. It was only in 1724, some 143 years after the king's death that Maha Yazawin, the official chronicle of Toungoo Dynasty, first proclaimed his genealogy. According to Maha Yazawin, he was born to a gentry family in Toungoo (Taungoo), then a former vassal state of Ava Kingdom. He was descended from viceroys of Toungoo Tarabya (r. 1440–1446) and Minkhaung I (r. 1446–1451) from his father's side; and from King Thihathu of Pinya (r. 1310–1325) and his chief queen Mi Saw U of Pagan Dynasty from his mother's side. Furthermore, Ye Htut was distantly related to then presiding ruler of Toungoo Mingyi Nyo and his son Tabinshwehti through their common ancestor, Tarabya of Pakhan. Later chronicles simply repeat Maha Yazawin's account. In all, the chronicles (perhaps too) neatly tie his ancestry to all the previous main dynasties that existed in Upper Burma: Ava, Sagaing, Myinsaing–Pinya and Pagan dynasties.

Despite the official version of royal descent, oral traditions speak of a decidedly less grandiose genealogy: That his parents were commoners from Ngathayauk in Pagan district or Htihlaing village in Toungoo district, and that his father was a toddy palm tree climber, then one of the lowest professions in Burmese society. The commoner origin narrative first gained prominence in the early 20th century during the British colonial period as nationalist writers like Po Kya promoted it as proof that even a son of a toddy tree climber could rise to become the great emperor in Burmese society. To be sure, the chronicle and oral traditions need not be mutually exclusive since being a toddy tree climber does not preclude his having royal ancestors.

Childhood and education

Whatever their origin and station in life may have been, both of his parents were chosen to be part of the seven-person staff to take care of the royal baby Tabinshwehti in April 1516. Ye Htut's mother was chosen to be the wet nurse of the prince and heir apparent. The family moved into the Toungoo Palace precincts where the couple had three more sons, the last of whom died young. Ye Htut had an elder sister Khin Hpone Soe, and three younger brothers: Minye Sithu, Thado Dhamma Yaza II, and the youngest who died young. He also had two half-brothers, Minkhaung II and Thado Minsaw who were born to his aunt (his mother's younger sister) and his father.

Ye Htut grew up playing with the prince and the king's other children, including Princess Thakin Gyi, who would later become his chief queen. He was educated in the palace along with the prince and other children. King Mingyi Nyo required his son to receive an education in military arts. Tabinshwehti along with Ye Htut and other young men at the palace received training in martial arts, horseback riding, elephant riding, and military strategy. Ye Htut became the prince's right-hand man.

Rise to power

On 24 November 1530, Mingyi Nyo died and Tabinshwehti ascended to the throne. The 14-year-old new king took Ye Htut's elder sister Khin Hpone Soe as one of his two principal queens, and rewarded his childhood staff and friends with royal titles and positions. Ye Htut, already a close confidant of the new king, instantly became a powerful figure in the kingdom which was surrounded by increasingly hostile states. In the north, the Confederation of Shan States had conquered the Ava Kingdom just three and a half years earlier. To the west was the Confederation's ally Prome Kingdom. To the south lay the Hanthawaddy Kingdom, the wealthiest and most powerful of all post-Pagan kingdoms. The impending threat became more urgent after the Confederation defeated its former ally Prome in 1532–1533. Tabinshwehti and Toungoo leadership concluded that their kingdom "had to act quickly if it wished to avoid being swallowed up" by the Confederation.

It was during the kingdom's mobilizations that Ye Htut made his mark, and was noticed for "his deeds of valor and strength of character." Ye Htut was by the king's side in 1532 when the king and his 500 most skillful horsemen made an uninvited foray into the Shwemawdaw Pagoda at the outskirts of Pegu, the capital of Hanthawaddy, ostensibly for the king's ear-piercing ceremony. The audacious intrusion went unpunished by Hanthawaddy's weak ruler, King Takayutpi. Ye Htut became the constant companion and adviser to the young king.

However, the close relationship between the two was severely tested in 1534, as they prepared for war against Hanthawaddy. Ye Htut had become romantically involved with Thakin Gyi, the king's younger half-sister, and the affair was discovered c. April 1534. The commoner's affair with the king's sister under Burmese law constituted an act of treason. Ye Htut spurned suggestions of mutiny and submitted to arrest. Tabinshwehti deliberated at length with his ministers, and finally came to the conclusion that Ye Htut should be given his sister in marriage, and a princely title of Kyawhtin Nawrahta. With this decision, Tabinshwehti won the loyalty of his brother-in-law "without parallel in Burmese history".

Military leadership

Tabinshwehti's decision would pay enormous dividends in the following years. Between 1534 and 1549, Toungoo would bring war to all its neighbors and in the process found the largest polity in Burma since the fall of Pagan in 1287. Ye Htut would win many key battles for his king, and help administer the growing kingdom.

In late 1534, Toungoo attacked Hanthawaddy, the larger, wealthier but disunited kingdom to their south. It was Toungoo's gambit to break out of its narrow landlocked realm before the Confederation's attention turned to the last remaining holdout in Upper Burma. While Toungoo did not yet have any foreign firearms, after having received a constant flow of refugees from elsewhere in Upper Burma for the last three decades, Toungoo did have more manpower than it normally could have enlisted.

Tabinshwehti and Ye Htut (now styled as Kyawhtin Nawrahta) were to cut their teeth in failure however. Their maiden annual dry-season campaigns (1534–1537) all failed against Pegu's well armed, heavily fortified defenses. But their performance got better with each successive campaign, penetrating deeper and deeper into Hanthawaddy territory. They finally broke through in their 1538–1539 campaign, and captured Pegu. Kyawhtin Nawrahta made his name in the Battle of Naungyo in which his light forces decisively defeated numerically superior Hanthawaddy forces in the Irrawaddy Delta. The battle, one of the most famous in Burmese military history, has been called "the first characteristic touch" of the great Bayinnaung. After the battle, a grateful Tabinshwehti bestowed his brother-in-law the title of Bayinnaung ("King's Elder Brother"), the name by which he would be remembered.

Toungoo went on to conquer all of Hanthawaddy by mid-1541, gaining complete control of Lower Burma's manpower, access to foreign firearms and maritime wealth to pay for them. And Tabinshwehti would use these new found assets for further expansions. By incorporating Portuguese mercenaries, firearms and military tactics to the Toungoo armed forces, Tabinshwehti and Bayinnaung continued to grow as military leaders. The duo also benefited from having experienced former Hanthawaddy military commanders like Saw Lagun Ein and Smim Payu serve as their top military advisers and generals. With their help, Bayinnaung delivered key decisive victories at the Battle of Padaung Pass (1542) against Prome's ally Arakan and the Battle of Salin (1544) against the Confederation, enabling Toungoo to take over central Burma as far north as Pagan (Bagan). After Bayinnaung crushed Arakanese forces in April 1542, Tabinshwehti was so pleased with the victory that he made Bayinnaung the heir-apparent of the kingdom.

The duo's later campaigns against Arakan (1545–1547) and Siam (1547–1549) however fell short. In both campaigns, Toungoo forces won all major open battles, and went on to lay siege to the capitals, Mrauk-U and Ayutthaya respectively. But they still had no answer to heavily fortified defenses equipped with Portuguese firearms, and had to retreat both times. Toungoo's own Portuguese supplied cannon had little impact on the walls of both capitals. Nor did they have enough manpower (19,000 and 12,000 troops respectively in Arakanese and Siamese campaigns) for long-term sieges. Nonetheless, despite the setbacks, Tabinshwehti and Bayinnaung by 1549 had built up the largest polity in Burma since the fall of Pagan Empire in 1287, stretching from Pagan in the north to Tavoy in the south.

Administrative duties

Bayinnaung was also entrusted to administer the kingdom. Tabinshwehti appointed him chief minister in 1539. In then prevailing administrative model, the role of the prime minister was limited to managing and coordinating semi-independent tributaries, autonomous viceroys, and governors who actually had control over day-to-day administration and manpower. Trusted local rulers like Smim Payu and Saw Lagun Ein were appointed by the king to assist Bayinnaung with central administration.

In 1549, Tabinshwehti, who had developed a liking to wine, gave up all administrative duties to Bayinnaung, and spent much of his time on long hunting trips away from the capital. Concerned by the king's erratic behavior, ministers at the court urged Bayinnaung to take over the throne but he declined, saying he would try to "win back the king to his old sense of duty to his own kingdom". He was unsuccessful. Even when faced with a serious rebellion by Smim Htaw, the king asked Bayinnaung in January 1550 to suppress the rebellion, and went on another months-long hunting trip.

Interregnum

On 30 April 1550, Tabinshwehti was assassinated by his own bodyguards on the order of Smim Sawhtut, one of the king's close advisers. Smim Sawhtut naturally proclaimed himself king. But so did all other major governors and viceroys—including Bayinnaung's own brother Minkhaung II. Although Bayinnaung had been Tabinshwehti's chosen heir apparent since 1542, none of them acknowledged Bayinnaung as the rightful successor. When Bayinnaung received the news of the assassination, he was in Dala (modern Yangon) chasing after Smim Htaw's rebel forces. The Toungoo Empire, which he had helped found for the last 16 years, lay in ruins. He, as a colonial era historian noted, was "a king without a kingdom".

Bayinnaung would have to rebuild the kingdom all anew. At Dala, with "few but faithful" troops, he plotted his next moves. His two eldest younger brothers Minye Sithu and Thado Dhamma Yaza II were with him and remained loyal. Also in his service was an ethnic Mon commander named Binnya Dala who would become his most trusted adviser and "best commander". Because he did not yet have any foreign mercenaries who could handle firearms, he sent for his favorite Portuguese mercenary Diogo Soares de Mello who had greatly impressed him in the Siamese campaign. Soares, who was abroad, returned with his men (all 39 of them), and he was warmly received by Bayinnaung.

Two months after the assassination, Bayinnaung was ready to start the restoration project. He faced the following adversaries:

Toungoo (1550–1551)

After much deliberation, Bayinnaung and his advisers decided that their war of restoration would begin at Toungoo, the original home of the dynasty. It was a calculated gamble since they would have to pass through the heart of Pegu-controlled territory. But they decided to take the gamble because they felt Bayinnaung would find best support in his native Toungoo rather than in the deep Mon country they found themselves in.

In late June, Bayinnaung and his small but cohesive unit of fighting men left Dala for Toungoo. They marched north to Hinthada, and then crossed over to the eastern side of Bago Yoma, north of Pegu. Smim Sawhtut, now "king" of Pegu, came out with his army to stop them. Bayinnaung, as recounted by the chronicles, paid "no more heed than a lion does to jackals", and marched on. Discovering that Bayinnaung's target was not Pegu, Sawhtut did not engage them. Bayinnaung set up camp at Zeyawaddy (ဇေယျဝတီ), 50 km (30 miles) outside of Toungoo. Once there, Bayinnaung received many of the ministers and soldiers of Tabinshwehti's old court, who fled Pegu and Martaban. The new arrivals were of all ethnic backgrounds, Burmans, Shans and indeed Mons, demonstrating that in the 16th-century Burma, "vertical patron-client structures often preempted horizontal ones, even those as strong as ethnic identity and cultures".

By late August, he had collected a serious fighting force (9600 men, 200 horses, 20 elephants, 200 war boats). His land and naval forces began the attack on 2 September 1550, and laid siege to the city. Minkhaung resisted for four months but finally surrendered on 11 January 1551. Remarkably, Bayinnaung forgave his brother. On the same day, he was crowned king at the temporary palace. He rewarded his men with upgraded titles and positions. His eldest son Nanda was made the heir apparent.

Prome (1551)

The Toungoo command selected Prome as their next target. In March 1551, Bayinnaung's army of (9000 troops, 300 horses, 25 elephants) attacked the city. But the city's musket and artillery fire kept them at bay for over three months. He retreated on 19 June 1551, and reloaded with men from central Burma (up to Myede and Sagu) whose rulers now submitted to the new rising power. Another 9,000-strong army resumed the siege on 21 August 1551, and took the city on 30 August 1551. Bayinnaung ordered the execution of Prome's ruler Thado Dhamma Yaza I but regretted the decision immediately afterwards. He appointed his second eldest younger brother as viceroy of Prome with the style of Thado Dhamma Yaza II.

Pagan (1551)

Bayinnaung then proceeded to complete the conquest of northernmost central Burma up to Pagan (Bagan) by mid-September 1551. He appointed his uncle Min Sithu governor. He then marched to Ava, hoping to take advantage of the civil war between King Mobye Narapati and Sithu Kyawhtin, governor of Sagaing. But he was forced to withdraw speedily as Pegu forces marched toward Toungoo.

Lower Burma (1552)

Pegu's forces withdrew from his territory but Bayinnaung now decided that Pegu must be eliminated first. Meanwhile, Mobye Narapati, who had been driven out of Ava, came to join Bayinnaung. After five months of preparation, Bayinnaung's army (11,000 men, 500 horses, 40 elephants) left Toungoo for Pegu on 28 February 1552 and arrived before the city on 12 March 1552. Smim Htaw, who had taken over Pegu since August 1550, came out and challenged Bayinnaung in single combat, which Bayinnaung accepted. The two men on their respective war elephants fought. Bayinnaung was victorious, driving Htaw and his elephant off the field. Htaw's men fled following their leader.

Htaw and his small army fell back to the Irrawaddy delta. Toungoo armies followed up, taking eastern delta towns by the end of March. Htaw's army briefly retook Dala in a daring attack but they were finally defeated near Bassein (Pathein) in mid-May. His entire army, including his chief queen and father-in-law, were captured. Htaw barely escaped. He would be on the run as a fugitive until he was captured and executed in March 1553. By mid-1552, Bayinnaung had gained control of all three Mon-speaking regions (Bassein, Pegu, and Martaban). He appointed his eldest younger brother Minye Sithu as viceroy of Martaban on 6 June 1552.

Upper Burma (1553)

Two years after Tabinshwehti's death, Bayinnaung had restored the late king's empire. But he considered his job unfinished because Siam, which according to him had been remiss in sending him, the rightful successor of Tabinshwehti, tribute. He seriously considered invading Siam but his advisers led by Binnya Law, governor of Bassein, recommended that he should attack Ava instead. Taking their advice, the king sent 14,000-strong combined land and naval forces led by his heir apparent Nanda on 14 June 1553. But Ava's new king Sithu Kyawhtin (of the House of Mohnyin) was ready. He had enlisted troops from five ally Shan states (Mohnyin, Mogaung, Momeit, Onbaung, and Bhamo) and from his own vassal states throughout the Mu valley and Kyaukse districts. Arrayed against overwhelming defenses, Nanda called off the invasion.

Coronation

Bayinnaung decided to consolidate his gains instead. He commissioned a new palace, called Kanbawzathadi, in his capital Pegu on 17 November 1553. On 12 January 1554, he was formally crowned king with the reign name of Thiri Thudhamma Yaza (သီရိ သုဓမ္မ ရာဇာ). His chief queen, Thakin Gyi, was crowned with the reign name of Agga Mahethi (အဂ္ဂ မဟေသီ).

Expansion of Toungoo Empire

The reconquest of Lower Burma gave him complete control of much needed access to foreign firearms and maritime wealth to pay for them. In the next two decades, he would use these new found assets for further expansions, and by pyramiding manpower and resources from newly conquered lands, he would found the largest empire in the history of Southeast Asia.

Upper Burma (1554–1555)

By late 1554, Bayinnaung had assembled a large invasion force (18,000 men, 900 horses, 80 elephants, 140 war boats), the largest mobilization to date. Precautions were taken on the frontiers to guard against attacks from Lan Na, Siam and Arakan. 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 (Bhamo, Kale, Mogaung, Mohnyin, Momeik, Mone, Nyaungshwe, Theinni and Thibaw-Onbaung), could not stop the advance, and the capital Ava fell to the southern forces on 22 January 1555. King Sithu Kyawhtin was sent to Pegu. Bayinnaung appointed his younger brother Thado Minsaw viceroy of Ava. Toungoo forces then drove out the remaining Confederation armies from the Chindwin valley up to Monywa, the Mu valley up to Myedu and the Kyaukse valley up to Singu by late March.

Bayinnaung now controlled both the Irrawaddy and Sittaung river valleys, the corridors to and from the "heartland" where most of the food of the country was produced and its population lived. Still, his hold on Upper Burma was small—his northernmost outpost Myedu was only about 160 km (100 miles) from Ava—and tenuous since he had not secured the allegiance of the surrounding Shan states, which had been the source of constant raids into the upcountry since the 14th century, and indeed dominated much of it since the early 16th century. He needed to bring the surrounding unruly states under control if his hold on Upper Burma was to last.

Cis-Salween Shan states (1557)

By 1556, the king and his court had decided that all the Shan states immediately surrounding the Irrawaddy valley needed to be reduced in one shot. They also recognized that they may need to take on Lan Na (Chiang Mai), which was an ally of the powerful state of Mone. The Toungoo command spent the year collecting the largest army yet again (36,000 men, 1200 horses, 60 elephants, 180 war boats, and 100 cargo boats) for the invasion.

The invasion of the Shan country began in January 1557. (The armies left their Ava base between 24 December 1556 and 8 January 1557.) The massive show of force worked. States one after another submitted with minimal resistance. By March 1557, Bayinnaung in one stroke controlled most of the cis-Salween Shan states from the Patkai range at the Assamese border in the northwest to Mohnyin (Mong Yang), Mogaung (Mong Kawng) in present-day Kachin State to Momeik (Mong Mit), and Thibaw (Hsipaw) in the northeast. But the order broke down right after the army left. The powerful state of Mone (Mong Nai), which sent in tribute in 1556 and thus did not face the invasion, revolted with the support of Lan Na, which not accidentally was ruled by Mekuti, a brother of Mone's ruler. Mone forces went on to occupy Thibaw, and executed the new saopha appointed by Bayinnaung. In November 1557, five Toungoo armies (33,000 men, 1800 horses, 170 elephants) led by the king himself invaded, and easily occupied Mone and Thibaw.

By the end of 1557, of the cis-Salween states, only the Chinese vassals—Theinni (Hsenwi; present-day northern Shan State), Mowun, Kaingma, Sanda, and Latha (present-day Dehong and Baoshan prefectures in Yunnan, China)—remained outside Bayinnaung's grasp. The Toungoo command seriously considered attacking Theinni as Thado Minsaw's army was already in neighboring Thibaw. But they decided not to open another front while Lan Na remained a threat to southern Shan states.

Lan Na (1558)

Bayinnaung now eyed the once powerful Kingdom of Lan Na, which had been involved in dynastic struggles between two branches of the Mengrai dynasty. The rule of King Mekuti of the House of Mone had been resisted by King Setthathirath of Lan Xang, grandson of King Ketklao of Lan Na. When Bayinnaung and his armies showed up at the gates of Chiang Mai on 31 March 1558, Mekuti surrendered without a fight on 2 April 1558. The Burmese king allowed Mekuti to remain ruler of Lan Na, and brought several artisans, many of whom were notable lacquerware workers, back to Pegu. He left a small garrison of 1000 men commanded by Binnya Dala and Binnya Set at Chiang Mai.

The order broke down soon after the main armies left. Setthathirath occupied eastern provinces of Lan Na (Phrae, Nan, Chiang Rai and Chiang Saen). In November 1558, a 14,000-strong army led by Thado Minsaw reinforced Chiang Mai's defenses, and from there the combined armies then successfully drove out Lan Xang forces from the territories.

Cis-Salween Chinese Shan states (1558–1559)

Lan Xang's defeat cemented Toungoo Burma's emergence as the premier power in the Shan country. The remaining cis-Salween Shan states fell in line even if they probably continued paying tribute to China. Theinni sent preemptive tribute, received on 26 July 1558. It was followed by tributary missions by smaller Chinese vassal states of Mowun, Kaingma, Latha and Sanda in early 1559.

Manipur (1560)

He immediately put manpower from the newly acquired territories to acquire yet more territory. On 2 December 1559, he ordered an invasion of Manipur, ostensibly to address the small kingdom's alleged transgressions into Kale's territory. He had recalled Binnya Dala from Chiang Mai to lead the invasion. Three armies (10,000 men, 300 horses, 30 elephants), mostly made up of conscripts from Kale, Mohnyin, Mogaung, Momeik and Sanda, faced minimal resistance. The Manipuri raja surrendered c. February 1560.

Trans-Salween Chinese Shan states (1562–1563)

The king spent the next two years preparing for war against Siam, which he considered his unfinished business. He set up a garrison at Tavoy (Dawei) on 17 June 1562. But he first wanted to bring trans-Salween Shan states to his fold, probably to get more manpower as well as to secure the rear. To be sure, the Burmese chronicles state that he was merely responding to a July 1562 rebellion by his cis-Salween Chinese Shan states with support from trans-Salween Shan states. However, as with Manipur, it may just have been a pretext. He sent four 12,000-strong armies, each led by Nanda, Thado Dhamma Yaza II, Minkhaung II and Thado Minsaw. The southernmost trans-Salween state of Kengtung submitted prior to the invasion on 16 December 1562. The armies launched a two-pronged invasion of the Taping valley in March/April 1563. The armies faced minimal resistance, and secured the allegiance of the local saophas. Bayinnaung now had at least nominal suzerainty over Chinese Shan states from the cis-Salween states in the Taping valley to Kenghung (present-day Xishuangbanna Dai Autonomous Prefecture, Yunnan) in the east.

Siam (1563–1564)

With much of western mainland Southeast Asia under his control, Bayinnaung now felt ready to take on Siam. He needed an overwhelming advantage in manpower over Siam because unlike interior Shan states, Siam could not be overwhelmed by the strength of his Portuguese firearms alone. Siam was a prosperous coastal power in its own right, and its forces included Portuguese firearms, ships and mercenaries. On 16 July 1563, he sent an embassy to Siam, demanding one of the four white elephants in possession of the Siamese king as tribute. As expected, King Maha Chakkraphat duly refused. On 1 November 1563, five armies (60,000 men, 2400 horses and 360 elephants) left Pegu to start the campaign. Another army from Lan Na was supposed to come down but King Mekuti of Lan Na had revolted.

The invasion route was via central Siam. The armies took a key central town of Kamphaeng Phet on 4 December 1563. Three of the armies then fanned out to acquire the key central Siam cities of Sukhothai, Phitsanulok, and Sawankhalok. Aside from a five-day battle at Phitsanulok, the armies faced minimal opposition. Rulers of the three cities as well as the ruler of Phichit submitted, and were reappointed to their positions.

The armies then marched down to Ayutthaya. There, they were kept at bay for weeks by the Siamese fort, aided by three Portuguese warships and artillery batteries at the harbor. The invaders finally captured the Portuguese ships and batteries on 7 February 1564, after which the fort promptly fell. The Siamese king surrendered on 18 February 1564. Bayinnaung took all four white elephants, among other loot, and sent the fallen king to Pegu. He appointed Mahinthrathirat, a son of the fallen king, vassal king of Siam, and left a garrison of 3,000. Thai sources state that Bayinnaung also took back with him Prince Ramesuan (ราเมศวร), the eldest son of Maha Chakkraphat, as well as Phraya Chakkri (พระยาจักรี), the chancellor of Ayutthaya, and Phra Sunthon Songkhram (พระสุนทรสงคราม), the military chief of Ayutthaya.

Lan Na and Lan Xang (1564–1565)

Although he had finally conquered Siam, he still needed to deal with the middle Tai country. King Mekuti of Lan Na had allied himself with his old rival Setthathirath of Lan Xang. On 23 October 1564, Bayinnaung himself led five massive armies (64,000 men, 3600 horses, 330 elephants) and began a two-pronged invasion of Lan Na. The levies hailed from all over the empire, including Siam whose troops were led by Ramesuan, the former crown prince of Siam. The massive show of force worked. When four southern armies showed up at Lamphun, 20 km south of Chiang Mai, on 25 November 1564, the commanders leading Chiang Mai's defenses simply fled the city. Mekuti now submitted, asking for forgiveness. Bayinnaung spared the broken king's life, and sent him to Pegu. The Burmese king then stayed in Lan Na for the next four months, administering the country. He appointed Queen Visuddhadevi, as the vassal ruler of Lan Na before leaving Chiang Mai on 10 April 1565 to deal with a serious rebellion in Pegu.

Lan Xang proved a much more difficult project however. Three armies led by the crown prince himself invaded Lan Xang, and easily captured Vientiane on 2 January 1565. But King Setthathirath escaped. For the next several months, the Burmese troops fruitlessly chased him and his small band of men around Laotian countryside. Many troops died of starvation and disease. The Burmese command finally gave up, and the armies left Vientiane on 1 August 1565. They had installed a son-in-law of Setthathirath as vassal king. They also brought back many members of Lan Xang royalty, including Setthathirath's 18-year-old brother, Maha Ouparat.

Lan Na was to be at peace for the rest of his reign. At Vientiane, however, the vassal king's authority did not extend much beyond the capital, backed by the Burmese garrison. Setthathirath remained active in the countryside, and would return to Vientiane in late 1567.

Maintaining the empire

After the Lan Xang campaign, Bayinnaung had at least nominal control over the lands stretching from Manipur in the northwest to Lan Xang in the east; and from Chinese Shan states in the north to the Malay peninsula in the south. After a brief lull, he was to spend nearly a decade (1568–1576) to keep the empire intact.

Interlude (1565–1567)

After the 1565 rebellion by resettled Shans in Pegu, he faced no new rebellions for the next two plus years (1565–1567). Because the rebellion burned down major swaths of the capital, including the entire palace complex, he had the capital and the palace rebuilt. The new capital had 20 gates, each named after the vassal who built it. Each gate had a gilded two-tier pyatthat and gilded wooden doors.

The newly rebuilt Kanbawzathadi Palace was officially opened on 16 March 1568, with every vassal ruler present. He even gave upgraded titles to four former kings living in Pegu: Mobye Narapati of Ava, Sithu Kyawhtin of Ava, Mekuti of Lan Na, and Maha Chakkraphat of Siam.

Lan Xang and Siam (1568–1569)

Even as he triumphantly entered the new palace as the universal ruler, or cakkavatti, trouble was already brewing in Lan Xang. About a month earlier, he had been informed that Setthathirath's forces not only had retaken Vientiane but also were raiding eastern districts of central Siam and Lan Na. In response, he had rushed down troops from the Shan states and Upper Burma to the border. But it was a rush job. The army could only muster 6000 troops on short notice, and was thoroughly routed at the border.

More bad news piled up. He learned on 12 May 1568 that southern Siam (Ayutthaya) too had revolted, and entered into an alliance with Lan Xang. The rebellion was led by Maha Chakkraphat, the deposed king of Siam whom Bayinnaung had just showered with honors and permitted to return to Ayutthaya on pilgrimage as a monk. No sooner had the monk arrived at Ayutthaya than he flung off the robe, and declared independence. But all was not lost. The ruler of central Siam (Phitsanulok), Maha Thammarachathirat, remained loyal to him. On 29 May 1568, a dismayed Bayinnaung sent an army of 6,000 to reinforce Phitsanulok.

The war began in June. Desperate to consolidate the Chao Phraya valley before the expected dry-season invasion, combined Ayutthaya and Lan Xang forces braved unforgiving rainy season conditions and laid siege to Phitsanulok. But Phitsanulok's reinforced defenses held. In late October/early November, the besiegers retreated to their respective cities before the upcoming invasion. Bayinnaung's five armies (54600 men, 5300 horses, 530 elephants) arrived at Phitsanulok on 27 November 1568. Reinforced at Phitsanulok, combined armies of 70,000 marched down along the Chao Phraya to Ayutthaya, and laid siege to the city in December 1568.

But the Burmese armies, despite taking immense losses, could not break through for months. When Setthathirath and his army approached to relieve the city, Bayinnaung left Binnya Dala in command of the siege, and left with half his force to meet the enemy. On 8 May 1569, he decisively defeated Setthathirath northeast of the city, after which Lan Xang ceased to be of concern to the siege operations. Meanwhile, Maha Chakkraphat had died, and his son Mahinthrathirat made an offer of conditional surrender. It was refused. Bayinnaung demanded an unconditional surrender. Instead he sent one of his Siamese nobles to the city, pretending to be a deserter. King Mahinthrathirat promptly appointed him to a high command. Through the spy's treacherous machinations, one of the city's gates was opened. The city fell on that very night on 2 August 1569. Bayinnaung appointed Maha Thammarachathirat king of Siam on 29 September 1569.

Remote regions

While Bayinnaung had decisively defeated Siam his most powerful rival in the neighborhood, his greatest challenge would turn out to be keeping remote, mountainous states in the farthest corners of his empire in check. Guerrilla warfare by small rebel armies combined with difficult terrains and starvation caused more problems for the king's armies than the armies of Siam ever did.

Lan Xang (1569–1570)

The remote hilly Lan Xang proved most troublesome. He personally led the two-pronged invasion of Lan Xang in October 1569. Setthathirath made a stand at Vientiane for a few months before retreating into the jungle in February 1570 to conduct his tried-and-true guerrilla warfare. Bayinnaung and his men spent the next two months combing the Lao countryside. Setthathirath was nowhere to be found but many Burmese troops died of starvation and from long marches. He finally called off the search in April 1570, and returned home. When the king arrived back at Pegu, very few men of the original army survived to reach their own country.

Northern Shan states (1571–1572)

Lan Xang was not the only remote, mountainous region the Burmese king had trouble controlling. Northernmost Shan states of Mohnyin and Mogaung (and their vassals in present-day Kachin State and Sagaing Region) collectively revolted in July 1571. He sent two 12,000-strong armies led by Nanda and Thado Dhamma Yaza II. The armies easily recaptured the states. But, like in Lan Xang, the troops spent five punishing months fruitlessly chasing after the renegade saophas in the snow-clad foothills of the Himalayas.

Lan Xang (1572–1573)

Meanwhile, Setthathirath's forces sacked the Burmese garrison at Vientiane. Fortunately for the Burmese, so it seemed, the Lan Xang king was killed shortly after—sometime before mid-1572, and a senior minister and general named Sen Soulintha seized the throne. (In Laotian history, the events took place a year earlier. Setthathirath retook Vientiane in the dry season of 1570–1571, and died in 1571.) Much to his surprise, Soulintha refused his ultimatum to submit. Incredulous, Bayinnaung sent Binnya Dala to lead the invasion with a small army of 6000, with the majority of troops coming from Lan Na and Siam. But he and the Toungoo court had underestimated the opposition. Lan Xang's strength was more than Setthathirath, and Soulintha proved no pushover. The small Burmese army suffered from guerrilla attacks, and had to retreat in early 1573. At Pegu, the king was furious at Binnya Dala, hitherto his most trusted adviser and favorite general, despite the fact that he had given the general little to work with. He sent Binnya Dala into exile "to a sickly place" in central Siam, where the general who had won him many a battle died from illness six months later.

Lan Xang and northern Shan states (1574–1577)

He immediately ordered to raise the levy to invade Lan Xang in the following dry season of 1573–1574. But the kingdom had been in constant campaign mode, and his annual demands of more levy were pushing his vassals to a breaking point. Even his senior advisers murmured loudly, and the king reluctantly agreed to postpone the expedition for a year. The respite did little to restore the ranks of depleted vassals. When the conscription drive came in 1574, the northernmost states of Mohnyin and Mogaung refused, and revolted.

The king was unfazed. He ordered Thado Minsaw, the ruler of Ava, to take care of the northern states while he would personally lead the Lan Xang campaign. On 1 October 1574, Thado Minsaw's army (6000 men, 800 horses, 80 elephants), made up of regiments from Upper Burma and Shan states, marched north. Six days later, Bayinnaung's four armies (34,000 men, 1800 horses, 180 elephants), with regiments from Lower Burma, Lan Na and Siam, began the Lan Xang campaign. The armies arrived before Vientiane after 60 marches. On 6 December 1574, the king and his massive armies faced no opposition entering Vientiane, as Soulintha had already evacuated to the countryside. Fortunately for the Burmese king, Soulintha was viewed as a usurper by his own officers, who arrested and presented him to the conqueror. Burmese armies again fanned out to and received tribute from the Lao countryside, including easternmost Lan Xang, which are now part of present-day Vietnam. The Burmese king appointed a younger brother of Setthathirath, Maha Oupahat (Chao Tha Heua), king of Lan Xang with the regnal name Voravongsa I, and returned to Pegu on 16 April 1575. But he was a true high Lan Xang royal, and was accepted by the populace as the rightful successor to Setthathirath. Lan Xang was finally under control.

The low-grade rebellion in Mohnyin and Mogaung remained a pesky thorn in his side. The rebel chiefs simply retreated to the jungle when the army showed up, returning right after the army left. The king was particularly annoyed that the leader of the rebellion, the young saopha of Mogaung, had been raised at the Pegu palace, and that he himself had appointed him to the office in 1572. He personally marched north in late 1575, and sent several battalions to comb the jungles. One battalion ran into the rebels in deep in the hills, and killed the saopha of Mohnyin. But the saopha of Mogaung escaped and remained at large for another year and a half. When the renegade saopha was finally captured, and brought before the king on 30 September 1577, the king ordered that the young chief be exhibited in fetters for a week at each of the twenty gates of Pegu, and that he and his followers be sold as slaves in India.

Ceylon

By 1576, no one wanted to challenge his rule, and the rest of his reign was to be quiet. Other states in the region—in particular, rival Ceylonese kingdoms—were keen to receive his support. For his part, Bayinnaung viewed himself as the protector of Theravada Buddhism, and had long tried to promote and protect the religion in Ceylon. Two decades earlier, in November 1555, he sent rich presents to the Tooth of Kandy, and bought land there to keep lights continually burning at the shrine. His craftsmen beautified the temple and swept it with the broom made of his hair and his chief queen's. In 1560, upon hearing that the Portuguese had seized and taken the tooth relic to Goa, he sent envoys to secure the relic for 800,000 silver kyats (41,000 pounds sterling) and shiploads of rice, whenever needed, to provision the Portuguese garrison at Malacca. Viceroy Constantino de Bragança was interested but Archbishop of Goa, Gaspar de Leão Pereira, overruled him by threatening the viceroy with an Inquisition style trial. In 1561, "while the Burmese envoys gazed in frozen horror, the archbishop placed the Tooth in a mortar, grounded it to powder, burned it in a brazier, and cast the ashes into the river." To be sure, the Ceylonese claimed that the destroyed relic had been a replica, and that the true Tooth had remained in Ceylon. Two teeth, claiming to be the real Tooth, appeared in Ceylon, one at Colombo and the other at Kandy.

By the 1570s, both Kotte and Kandy were jockeying for his support. King Dharmapala of Kotte was most active. He presented who he said was his daughter to Bayinnaung. The princess was received with great fanfare at Bassein (Pathein) on 24 September 1573. According to G.E. Harvey, however, the Kotte king's action was not voluntary: the Burmese king had demanded a princess to fulfill a prophecy given by his astrologers, and Dharmapala, who had no daughters, complied by sending the daughter of a chamberlain, whom he had treated as his own. At any rate, Dharmapala, who had converted to Catholicism, continued to curry favor by sending what he claimed was the real Tooth relic, ostensibly to be safeguarded under the protection of the great Buddhist king. The main purpose of his mission was to seek military help against a rebellion. The Tooth was received on 14 July 1576. While it is unclear whether Bayinnaung actually believed in the authenticity of the relic, the possession of a holy Tooth, which many millions of subjects believed in, was of the highest importance. In return, Bayinnaung sent 2500 of his best "invulnerables" from all parts of the empire in five ships to Columbo. The king's best troops easily defeated the rebellion, which was noticed by the other three rulers on the island. Chronicles say that the Burmese generals then received the rulers of the four kingdoms of Ceylon in Columbo, and instructed to safeguard the religion. King Karaliyadde Bandara of Kandy, offered a daughter and what he claimed was the real Tooth. But His Majesty, seeing no reason to reopen the case, would not enter into controversy with skeptics and dismissed them with thanks.

Lan Na and Lan Xang (1579)

No troubles arose when Queen Visuddhadevi of Lan Na, who had successfully kept the middle Tai country quiet for over 13 years, died on 2 January 1579. His choice Nawrahta Minsaw, one of his sons, faced no problems taking over the Lan Na throne. When instabilities arose in Lan Xang, he took no chances. On 17 October 1579, he sent a sizable army (22,000 men, 1200 horses, 120 elephants), which faced no opposition. According to Laotian history, the vassal king of Lan Xang Maha Ouparat died in 1580, and Bayinnaung installed Sen Soulintha, the usurper whom he had kept in Pegu since 1574, as the successor. The Burmese chronicles make no mention of any change for the rest of the king's reign. Chronicles' lone post-1579 entry on Lan Xang during his reign simply states that on 2 September 1581, the king commissioned a Buddhist pagoda in Lan Xang. Chronicles say that the vassal king died in September/October 1588.

Arakan (1580–1581)

By 1580, not only had the "universal ruler" subdued all the countries which had occupied his attention for the last three decades but he also had the respect from neighboring states. He faced no internal or external threats (although Portuguese Goa considered it was technically at war with Burma for her interference in Ceylon). Instead of resting, he turned his gaze on Arakan, the kingdom he and Tabinshwehti unsuccessfully tried to conquer in 1545–1547. He determined that it was now time to reduce the western coastal kingdom to the vassal status it held under the Pagan kings once more. A year earlier, he had sent an embassy to Emperor Akbar of the Mughal Empire, which had just acquired Bengal in 1576, perhaps to ascertain whether his occupation of Arakan would be viewed as an act of hostility to the Mughals.

At any rate, the king sent an 8000-strong naval invasion force on 15 October 1580. The naval fleet, which consisted of 200 ships, went on to occupy Sandoway in November 1580. The king had probably planned to lead the assault on the Arakanese capital Mrauk-U by himself but could not because of his failing health. The invasion force remained inactive at Sandoway for a year. The king sent additional land and naval forces (29,000 troops, 1600 horses, 120 elephants) on 28 August 1581 in preparation for the coming dry season campaign. But the king died six weeks later, and the invasion forces withdrew soon after.

Emperor without an empire

Bayinnaung successfully assembled the largest empire in Burmese history. The empire spanned "from Manipur to Cambodian marches and the borders of Arakan to Yunnan," and likely received "propitiatory homage" from states as far east as Vietnam and Cambodia. Notwithstanding its fragility, his realm was certainly the largest empire in the history of mainland Southeast Asia and "probably the largest empire in the history of Southeast Asia." The Portuguese called Pegu "the most powerful monarchy in Asia except that of China."

But Bayinnaung, who began his reign as a "king without a kingdom", ended the reign as an "emperor without an empire." According to Than Tun, Bayinnaung conquered territories not to colonize them but to gain the loyalty of their rulers. He kept conquered kings and lords in their own positions so long as they remained loyal to him. Tun Aung Chain adds that "the extensive polity was held together not so much by formal institutions as personal relationships" based on the concepts of thissa (သစ္စာ, 'allegiance') and kyezu (ကျေးဇူး, 'obligation')." Lieberman writes: "... he presented himself as cakkavatti, or World Ruler, par excellence..."

This was nothing new. The king was simply following then prevailing Southeast Asian administrative model of solar polities in which the high king ruled the core while semi-independent tributaries, autonomous viceroys, and governors actually controlled day-to-day administration and manpower. As such, the "King of Kings" governed only Pegu and the Mon country himself, leaving the rest of the realm to vassal kings in Ava, Prome, Lan Na, Lan Xang, Martaban, Siam, Toungoo. He regarded Lan Na as the most important of all the vassal states, and spent much time there.

He administered Lower Burma with the help of ministers, the vast majority of whom were of ethnic Mon background. (The word used by European visitors to describe a court official was semini, Italian translation of smim, Mon for lord.) His chief minister was Binnya Dala, known for military and administrative abilities, and literary talents.

Administrative reforms

He introduced administrative reforms only at the margins. By and large, he simply grafted the prevailing decentralized administration system, which barely worked for petty states like his native Toungoo, to the largest polity ever in the region. Indeed, it did not work for mid-size kingdoms like Ava, Hanthawaddy, Lan Na, and Siam. (Ava had always had to contend with Prome and Toungoo; Pegu with Martaban and Bassein; Chiang Mai with Chiang Saen and Nan; Ayutthaya with Phitsanulok; etc.) Now, because of the sheer size of the empire, the system was even more decentralized and stretched thinner still. At any rate, it was the only system the Toungoo kings knew, and they "had no choice but to retain it."

He, perhaps inadvertently, did introduce a key reform, which turned out to be his most important and most enduring of his legacies. It was his policy to administer the Shan states, which had constantly raided Upper Burma since the late 13th century. The king permitted the saophas of the states to retain their royal regalia and ceremonies, and feudal rights over their subjects. The office of the saopha remained hereditary. But the incumbent saopha could now be removed by the king for gross misconduct although the king's choice of successor was limited to members of the saopha's own family. The key innovation was that he required sons of his vassal rulers to reside in the palace as pages, who served a dual purpose: they were hostages for good conduct of their fathers and they received valuable training in Burmese court life. His Shan policy was followed by all Burmese kings right up to the final fall of the kingdom to the British in 1885.

Still, his reforms were ad hoc and experimental. Patron-client relationships still mattered much more than weak or non-existent institutions: his vassals were loyal to him, not Toungoo Burma. The reforms he started would ultimately be expanded by his 17th-century successors. But they had not sufficiently taken root by his death to prevent his "overheated" empire from rapidly collapsing in the next two decades.

Legal and commercial standardizations

His Majesty introduced a measure of legal uniformity by summoning learned monks and officials from all over dominions to prescribe an official collection of law books. The scholars compiled Dhammathat Kyaw and Kosaungchok, based on King Wareru's dhammathat. The decisions given in his court were collected in Hanthawaddy Hsinbyumyashin Hpyat-hton. He promoted the new law throughout the empire so far as it was compatible with customs and practices of local society. The adoption of Burmese customary law and the Burmese calendar in Siam began in his reign. He also standardized the weights and measurements such as the cubit, tical, basket throughout the realm.

Religious affairs

Another enduring legacy of Bayinnaung was his introduction of a more orthodox Theravada Buddhism to Upper Burma and the Shan states. He propagated the religious reforms begun by King Dhammazedi in the late 1470s. Viewing himself as the "model Buddhist king," the king distributed copies of the scriptures, fed monks, and built pagodas at every new conquered state from Upper Burma and Shan states to Lan Na and Siam. Some of the pagodas are still to be seen, and in later ages the Burmese would point to them as proof of their claim to rule those countries still. Following in the footsteps of Dhammazedi, he supervised mass ordinations at the Kalyani Thein at Pegu in his orthodox Theravada Buddhism in the name of purifying the religion. He prohibited all human and animal sacrifices throughout the kingdom. In particular, he forbade the Shan practice of killing the slaves and animals belonging to a saopha at his funeral. His attempts to rid of animist nat worship from Buddhism, however, failed.

He donated jewels to adorn the crowns of many a pagoda, including the Shwedagon, the Shwemawdaw, the Kyaiktiyo, and many less famous ones. He added a new spire to the Shwedagon in 1564 after the death of his beloved queen Yaza Dewi. His main temple was the Mahazedi Pagoda at Pegu, which he built in 1561. He tried but failed to secure the release of the Tooth of Kandy from the Portuguese in 1560. He later interfered with internal affairs of Ceylon in the 1570s, ostensibly to protect the religion there.

Economy

His kingdom was mainly an agrarian state with a few wealthy maritime trading ports. The main ports were Syriam (Thanlyin), Dala, and Martaban. The kingdom exported commodities such as rice and jewels. At Pegu, overseas trade was in the hands of eight brokers appointed by the king. Their fee was two percent. Their honesty and business-like methods won the esteem of European merchants. The wealth was seen at the capital. Contemporary European travelers were "never tire of describing Pegu—the long moat full of crocodiles, the walls, the watchtowers, the gorgeous palace, the great processions with elephants and palanquins and grandees in shining robes, the shrines filled with images of massy gold and gems, an unending hosts armed men, and the apparition of the great king himself." The king appointed officials to supervise merchant shipping and sent out ships to undertake commercial voyages. The prosperous life at the capital, however, was probably not replicated at the countryside. Annual mobilizations of men greatly reduced the manpower necessary to cultivate the rice fields. Harvests at times fell perilously low, causing severe rice shortages, such as in 1567.

Military

Bayinnaung built the largest empire in Southeast Asia on the back of "breathtaking" military conquests. His success has been attributed to a "more martial Toungoo tradition", Portuguese firearms and foreign mercenaries, and larger forces.

First, he was a product of Toungoo, a rebellion-prone former vassal of Ava, where he like young men at the palace received a military-style education since childhood. With their training, he and Tabinshwehti launched their first campaign against a larger, wealthier Hanthawaddy when they were both just 18.

Secondly, the beginning of their military careers coincided with the arrival of Portuguese cannon and matchlocks in large quantities. Portuguese weaponry proved superior in accuracy, safety, ballistic weight, and rapidity of fire than Asian-made firearms. The duo arrived at the coast on the cusp of this transformation, and quickly turned it to their advantage, incorporating Portuguese firearms as well as Portuguese and Indian Ocean (mostly Muslim) mercenaries into their forces. Indigenous infantry and elephant units also began using guns, with 20–33% of the troops so equipped on some late 16th century campaigns. According to Lieberman, "had Toungoo attacked Pegu a generation later, it is conceivable that Portuguese guns could have given Pegu the victory, thus altering the course of history." But it was Toungoo that seized Hanthawaddy's advantages and leveraged them into an empire.

Finally, Bayinnaung was able to marshal more manpower than any ruler in the region. He required every new conquered state to provide conscripts for his next campaign. Using both larger forces and superior firearms, he had no trouble reducing Manipur and the entire Shan world to tributary status. His larger forces and their greater fighting experience proved to be the difference against Siam, which too was a wealthy coastal power with a powerful well-equipped military.

It turned out however that Siam was not his greatest adversary. It was the remote mountainous states like Lan Xang, Mohnyin and Mogaung whose guerrilla warfare gave him constant trouble. Many of his men died from starvation and disease while fruitlessly searching for elusive bands of rebels, year after year. (The death toll must have been significant since it made it to the chronicles.) He was fortunate that a charismatic guerrilla leader like Setthathirath died. In the end, his military might alone could not bring lasting peace. He needed competent local rulers, who commanded respect of the local populace, to rule the lands on his behalf. History shows that he used the political solution instead to maintain peace.

To be sure, the individual ingredients alone cannot explain his success. The same ingredients were available to his successors. Yet no one (in Burma or elsewhere in successor states of his empire) could put them together. For example, he raised upwards of 60,000 to 70,000 men for his major campaigns. His Toungoo successors raised a third at most. It was not until early Konbaung kings that the army again raised nearly as many men. Harvey notes: "From his teens until his death, he was constantly in the field, leading every major campaign in person. The failure of other kings who attempted the same conquests is the measure of his ability."

Death and succession

The king died on 10 October 1581 after a long illness. His full reign name at death was "Thiri Tri Bawa Naditra Pawara Pandita Thudhamma Yaza Maha Dipadi."

His eldest son and heir-apparent Nanda took over the throne without incident. But the empire, which Bayinnaung had built on military conquests and maintained by both military power and personal relationships with the vassal rulers, was to crumble soon after. The first crack appeared in the far north in September 1582 when Chinese Shan states of Sanda and Thaungthut revolted. The rebellion was put down in March 1583. Much more serious cracks followed. Ava (Upper Burma) revolted in October 1583, and the rebellion was put down on 24 April 1584. Siam revolted on 3 May 1584. Nanda would spend the rest of his reign fighting Siam and other former vassals and would lose the entire empire in the process by 1599.

Family

The king had three principal queens consort and over 50 other junior queens. In all, he left 97 children. The following is a list of notable queens and their issue.

A notable queen of Bayinnaung in Thai history is Suphankanlaya, daughter of King Maha Thammarachathirat of Siam.

Legacy

Bayinnaung is considered one of the three greatest Burmese kings, alongside Anawrahta and Alaungpaya, the founders of the First and Third Burmese Empires, respectively. The king is mostly remembered for his military conquests, not just in Myanmar but also in Thailand and Laos. His reign has been called "the greatest explosion of human energy ever seen in Burma." In Myanmar, the soldier-king is considered the favorite king of the present-day Burmese generals. According to Thant Myint-U, the generals often see themselves "as fighting the same enemies and in the same places... their soldiers slugging their way through the same thick jungle, preparing to torch a town or press-gang villagers. The past closer, more comparable, a way to justify present action. His statues are there because the ordeal of welding a nation together by force is not just history." In Thailand, he is well known as "Conqueror of Ten Directions" (พระเจ้าชนะสิบทิศ), from the 1931 novel Phu Chana Sip Thit (ผู้ชนะสิบทิศ, "Conqueror of Ten Directions") by Chot Phraephan (โชติ แพร่พันธุ์). He has thus far escaped the increasingly negative portrayals of Burmese kings in Thai history books. As the founder of an empire geographically centered in Siam, he is well known by the Thai people, and often still treated with respect. In Laos, King Setthathirath is lionized for his pesky resistance to the empire.

Though he is best known for empire building, his greatest legacy was his integration of Shan states, which eliminated the threat of Shan raids into Upper Burma, an overhanging concern to Upper Burma since the late 13th century. His Shan policy, greatly enhanced by later Toungoo kings, reduced the power of hereditary saophas, and brought hill customs in line with low-land norms. This policy was followed by Burmese kings right up to the final fall of the kingdom to the British in 1885.

The adoption of Burmese customary law and the Burmese calendar in Siam began in his reign. Siam used the Burmese calendar until 1889.

Commemorations

Bayinnaung is commemorated in Myanmar in several ways.