Background
Traditional rivalries and dispute over Mon rebels and the Tenasserim coast led to the Burmese-Siamese wars in the eighteenth century. In 1767, the Burmese of the newly foundedNine Armies War (July 1785 – March 1786)
Burmese preparations
King Bodawpaya began his Siamese expeditions in July 1785. The Burmese forces were drafted from its variousSiamese preparations
In November 1785, three Burmese men were captured by the Karens of Kyaukkaung. The captured Burmese revealed to Siamese authorities that King Bodawpaya was planning a massive invasion of Siam in multiple directions. King Rama I convened a council of royal princes and ministers to discuss the situation. The Siamese then sent a Burmese man named Nga Gan, who was a former retainer of King Bodawpaya captured by the Siamese, to negotiate with King Bodawpaya at the Three Pagodas. King Bodawpaya, however, was not interested in peace-making and instead inquired Nga Gan about Siamese preparations. The Bangkok court then sent warnings to various cities in Northern and Southern Siam about the impending invasions.Nine Armies War: Order of battle
From Martaban, Bodawpaya marched his armies through the Three Pagodas Pass. He ordered fourth and fifth divisions to enter through the Three Pagodas first into Kanchanaburi, followed by sixth and seventh divisions of his two sons and then the king's own army settled in Ranti (Alante) River. The vanguard of Minhla Kyawdin and Mingyi Maha Mingaung headed for the old city of Kanchanaburi (known today as "Latya", about fifteen kilometers to the northwest of modern city of Kanchanaburi), while the two princes stationed at Tha Dindaeng and Samsop in modern Sangkhlaburi District.Kanchanaburi front
Prelude
Due to a lack of supplies, Bodawpaya couldn't commit all his forces, numbering 88,000 men, present at the Kanchanaburi front. He was only able to send the 4th Division with 10,000 men under Minhla Kyawdin and the 5th Division with 5,000 men under Mingyi Maha Mingaung. Prince Maha Sura Singhanat with 30,000 men marched from Bangkok in December 1785 along with his generals and retinue, reaching Lat Ya () (called Kanpuri in Burmese) in Kanchanaburi. He sent the Mon general ''Phraya'' Mahayotha or Binnya Sein to intercept the Burmese at Kram Chang (in modern Si Sawat District). The vanguard Burmese armies of Minhla Kyawdin and Mingyi Maha Mingaung, numbered 15,000 combined, marched through Sai Yok and crossed from Khwae Noi River to Khwae Yai River, meeting Binnya Sein at Si Sawat. Binnya Sein was defeated and the Burmese continued to Latya at the foothills of Khao Chon Kai. They later set up camps. The Siamese army soon arrived and the Battle of Latya ensued.Battle of Thung Lat Ya
Maha Sura Singhanat sent a Siamese army to attack the Burmese, but the Burmese were able to repel the Siamese attack. Both sides started building towers to place cannons on top to bomb each other. Both sides suffered heavy losses. To dissuade the Siamese soldiers from retreating, Maha Sura Singhanat built 3 large mortars and announce that if anyone retreats, they will be crushed by them. Prince Maha Sura Singhanat noticed the Burmese supply lines were thin so he sent 500 men under the command of Phraya Siharatdecho, Phraya Tai Nam, and Phraya Phetchaburi to go ambush the Burmese supply lines at Phu Krai Sub-district. These men were too afraid to attack the Burmese army so they hid. They were later caught and beheaded. Maha Sura Singhanat then sent a force of 1,500 men under Khun Noen to ambush the Burmese supply lines. This devastated the Burmese supply lines.A stalemate
The battle reached stalemate and was dragged on to January 1786. Being afraid that his brother would lose the engagement, King Rama I decided to march his 20,000-men army from Bangkok in January 1786 to support Maha Sura Singhanat Lat Ya, but the prince then convinced the king to return to Bangkok because he was confident of winning the engagement.Breaking the stalemate
The Burmese side, upon observing the royal army arriving from Bangkok, believed that the Siamese was being reinforced. Prince Maha Sura Singhanat then had his army secretly march out of Lat Ya at night and march into Lat Ya again in the day, tricking the Burmese into believing that the Siamese was reinforced. With supply lines disrupted, the Burmese at Lat Ya were starved and deprived of morale. The Burmese killed horses for meat and dug for plant roots to eat. On 18 February 1786, the Siamese staged the all-out attack against the Burmese lines. Minhla Kyawdin and Mingyi Maha Mingaung the Burmese generals, unable to withstand Siamese attacks anymore, retreat. King Bodawpaya decided to give up the campaigns and ordered the general retreat of the Burmese armies on February 21, 1786.Aftermath
After two months of battle, the Siamese were able to repel the Burmese invasion at Lat Ya. Prince Maha Sura Singhanat ordered the Siamese to follow the retreating Burmese as far as Sangkhlaburi where the armies of the two Burmese princes were stationed. Prince Thiri Damayaza and Prince Thado Minsaw reported to King Bodawpaya at Ranti River about the defeat. King Bodawpaya then ordered the general retreat. A large number of Burmese were captured as prisoners. Thai sources mentioned that the Burmese suffered around 6,000 casualties as a result of the battle.Ratchaburi front
Prelude
Nemyo Nawrahta divided his 10,000-men army into 3 groups. Nemyo Nawrahta himself led an army of 4,000 men through the Bong Ti Pass (in modern Sai Yok District, Kanchanaburi Province) and stationed at Chom Bueng. Nemyo Nawrahta also sent his subordinate Dawei Wun to lead an army of 3,000 men to enter Ratchaburi through Suan Phueng. Dawei Wun and his army stayed at Khao Ngu, just five kilometers to the northwest of the town of Ratchaburi itself. They sustained themselves by harvesting coconuts and other fruits in the region. The remaining 3,000 troops were sent to join the 1st Division under Maha Thiri Thihathu at Myeik. ''Chao Phraya'' Thamma Boonrot, who led the Siamese army of 5,000 men in Ratchaburi town, was still unaware of these Burmese advances.Battle of Khao Ngu
After defeating the Burmese at Lat Ya in February 1786, Prince Maha Sura Singhanat then marched to Ratchaburi. He sent his two generals ''Phraya'' Kalahom Ratchasena and ''Phraya'' Chasaenyakorn ahead as vanguard. The two generals met the Burmese at Khao Ngu and defeated Dawei Wun and the Burmese army in the Battle of Khao Ngu. Dawei Wun retreated towards Suan Phueng and was followed by the Siamese. Nemyo Nawrahta at Chom Bueng, upon seeing the defeat of Dawei Wun at Khao Ngu, also decided to retreat as soon as he had received orders from King Bodawpaya.Aftermath
Prince Maha Sura Singhanat was angry that the Siamese general ''Chao Phraya'' Thamma Boonrot had allowed the Burmese to penetrate so deep into Ratchaburi. The prince petitioned King Rama I for Thamma Boonrot to be executed. However, as Thamma Boonrot had been a supporter in his ascension, King Rama I ordered his life to be spared. Thamma Boonrot was then whipped and paraded through the camps in shame with his head shaved. He was also stripped of his title and position as the Minister of Palatial Affairs.Northern front
Siege of Lampang
Prince Thado Thiri Maha Uzana ventured to recruit men from the Shan States and marched the Burmese army of 30,000 men to Chiang Saen. The Burmese governor of Chiang Saen called Aprakamani also provided resources. AsPreludes to the Battle of Pakphing
Prince Thado Thiri Maha Uzana also sent his ''Sitke'', Nemyo Sithu, to lead an army of 3,000 from Lampang down south towards the Upper Chao Phraya Plains. The governors of Sawankhalok, Sukhothai andBattle of Pakphing
Prince Anurak Devesh marched his army of 15,000 men from Bangkok to encamp at Nakhon Sawan. He sent ''Chao Phraya'' Mahasena Pli to Phichit just south of Pakphing to face Nemyo Sithu. The Siamese army of Prince Anurak Devesh in Upper Chao Phraya Plains was at risk of being attacked from two directions; from Pakphing by Nemyo Sithu in the north and from Tak by Nawrahta Kyawgaung from the west. Prince Anurak Devesh ordered ''Phraya'' Phraklang Hon to stay at Chai Nat to defend the rear lines against possible Burmese attacks from Tak. However, as both the Burmese and Siamese took their positions, neither sides engaged. Prince Maha Sura Singhanat and his generals returned from Ratchaburi to Bangkok in March 1786. King Rama I and Prince Maha Sura Singhanat devised the second-phase plan, in which King Rama I would lead armies to the north and Prince Maha Sura Singhanat to the south. King Rama I sent message to his nephew Prince Anurak Devesh at Nakhon Sawan, urging him to initiate the attacks against the Burmese. King Rama I marched the royal army of 30,000 men to Phichit to supervise campaigns in the northern theater, leaving Bangkok on March 10, 1786. As the king went to Phichit, Prince Anurak Devesh also moved to Phichit. King Rama I ordered another nephew Prince Thepharirak and Phraklang Hon at Chai Nat to march against Nawrahta Kyawgaung at Tak. Prince Anurak Devesh and Mahasena Pli at Phichit eventually engaged with Nemyo Sithu at Pakphing, leading to the Battle of Pakphing on 18 March 1786. The Burmese were defeated and Nemyo Sithu withdrew westward. The Burmese fled to the west crossing the Nan River where they were massacred by the pursuing Siamese and the bodies filled the river.Relieving the siege of Lampang
After the Battle of Pakping, King Rama I ordered ''Chao Phraya'' Mahasena Pli, together with the king's half younger brother Prince Chakchetsada, to lead the Siamese army to the north to relieve the siege of Lampang. When Prince Thepharirak sent Phraklang Hon had reached Kamphaeng Phet, however, Nawrahta Kyawgaung at Tak retreated after the Burmese defeat at Pakping and the engagements did not occur. As both the Burmese of the north and west had retreated, the king and Prince Anurak Devesh returned to Bangkok. Prince Kawila of Lampang had held out the town against the Burmese siege for four months. Mahasena Pli and Prince Chakchetsada reached Lampang in March 1786. The Siamese attacked the besieging Burmese at the rear and the Burmese Prince Thado Thiri Maha Uzana withdrew to Chiang Saen. Lampang was finally relieved from the Burmese siege. The Siamese was then able to repel the Burmese invasions in the Northern Theater.Thalang front
As the Siamese forces were concentrated on western and northern fronts, the southern Siamese cities were defenseless due to the lack of manpower and their governors were left on their own against the Burmese invasion. The Burmese general Maha Thiri Thihathu ("Kinwun Mingyi" in Thai sources) sailed the massive fleet of 10,000 men from Mergui to the Siamese Andaman Coast in December 1785. Maha Thiri Thihathu divided his armies in two routes; he sent Wungyi to lead a fleet of 3,000 men southward to attack Phuket, while himself led the rest of the army eastward across the Malay Peninsula to ravage the coast ofSiege of Thalang
Background
The modern city ofSouthern Thailand front
Prelude
Maha Thiri Thihathu sailed his 7,000-men fleet to disembark at Ranong, continuing to Kraburi and crossing the Tenasserim Hills at Pakchan to attack Chumphon. Maha Thiri Thihathu sent his ''Sitke-gyi'' Nemyo Gonnarat with 2,500 men ahead as vanguard. The governors of Chumphon and Chaiya decided to abandon their towns in the face of Burmese invasion due to manpower shortage. Maha Thiri Thihathu and Nemyo Gonnarat sacked both towns and continued southward toBattle of Chaiya
Prince Maha Sura Singhanat sailed his fleet of 20,000 men from Bangkok to the south, departing on March 4, 1786. The prince reached Chumphon and ordered his generals ''Phraya'' Kalahom Ratchasena and ''Phraya'' Chasaenyakorn to lead the vanguard to Chaiya. Maha Thiri Thihathu also sent ''Sitke-gyi'' Nemyo Gonnarat to Chaiya. Both sides engaged in the Battle of Chaiya. The Siamese was able to encircle the Burmese but the heavy rainfall neutralized most of the Siamese canons. Nemyo Gonnarat managed to break through the encirclement and fled westward and was closely pursued by the two Siamese generals. Many Burmese were captured as war prisoners and were brought to the prince at Chumphon. Burmese general Maha Thiri Thihathu at Ligor, upon seeing the defeat of his subordinate at Chaiya, decided to lead the Burmese to retreat westward through Krabi and back to Mergui. Prince Maha Sura Singhanat then marched to reclaim the city of Nakhon Si Thammarat. Prince Maha Sura Singhanat ordered ''Chao Phraya'' Nakhon Phat to be brought to him for the crime of cowardice. However, Nakhon Phat was pardoned due to the inevitability of his situation and was assigned to restore the city. As the lasts of the Burmese were expelled from Southern Siam, the Nine Armies' War came to the end.Conclusion
King Bodawpaya of Burma attempted to inflict the pincer attack from many directions on Central Siam and Bangkok. However, his many armies were expected to conjoin but failed to cooperate. The lack of provision supplies was the major disadvantage on the Burmese side, as the Burmese troops were starved at Kanchanaburi. The Siamese also adopted less defensive strategy than the previous wars. Siamese forces were sent to deal with the Burmese at the borders instead of locking themselves in fortifications and allowing the Burmese to penetrate. Despite being inferior in numbers, the Siamese were able to fend off the Burmese invasions. After the war, King Rama I awarded and promoted those who made contributions. His nephew Prince Anurak Devesh was awarded with the title ''Krom Phra Ratchawang Lang'' or the Prince of the Rear Palace. Lady Chan and Lady Muk, the heroines of Thalang, were given titles ''Thao'' Thep Krasattri and ''Thao'' Si Sunthon respectively. Chuai the monk who led the resistance against the Burmese at Phatthalung was made ''Phraya'' Tukkaraj the vice-governor of Phatthalung.Tha Din Daeng campaign
After the truce during thePrelude
After many defeats in early 1786, King Bodawpaya retreated to Martaban. However, he retained some of his forces on the Tenasserim Coast waiting for the new campaigns. The traditional wars were usually conducted inPreparations
Prince Nanda Kyawdin or Einshe Uparaja took the lead of the army of 50,000 men at Martaban, with Wundauk Nemyo Kyawzwa as his ''Sitke'' and Mingyi Nanda Kyawdin as ''Bogyok''. King Bodawpaya made sure that the provision shortage would not hinder the campaign again. He ordered the grain rations of Arakan and the whole Lower Burma to be sent to the frontlines. The Burmese also established strong supply lines with supply outposts stationed all along the way from Martaban to Kanchanaburi. Unlike the previous invasion, the Burmese concentrate the forces in single direction at Kanchanaburi instead of dispersing the forces in many directions. Prince Nanda Kyawdin sent Minhla Kyawdin, the Burmese veteran who had been defeated by the Siamese at the Battle of Latya seven months earlier, to lead the vanguard of 30,000 ahead into Kanchanaburi. The two Burmese vanguard commanders left Ava for Martaban on September 7, 1786. Emboldened by their successes earlier in the year, the Siamese were much more confident in their responses to the Burmese invasion. Both King Rama I and his brother Prince Maha Sura Singhanat marched to meet the Burmese at Kanchanaburi. *Prince Maha Sura Singhanat, along with his two generals ''Phraya'' Kalahom Ratchasena and ''Phraya'' Chasaenyakorn and ''Chao Phraya'' Rattanapipit the ''Samuha Nayok'', marched ahead the army of 30,000 men. *King Rama I himself and his nephew Prince Anurak Devesh of the Rear Palace led the royal army of 30,000 men. The Siamese royal forces left Bangkok on February 1, 1787, for Kanchanaburi to the west to face the invading Burmese.The Battle (February 1787)
The Burmese armies entered Kanchaburi through the Three Padodas Pass or Payathonzu. Minha Sithu divided his forces to station at Tha Dindaeng and Samsop, both in Sangkhlaburi, Kanchanaburi. Prince Nanda Kyawdin stayed at the Three Padogas. Prince Maha Sura Singhanat marched to Sai Yok in Kanchaburi and encamped. He ordered his generals ''Phraya'' Kalahom Ratchasena and ''Phraya'' Chasaenyakorn to march ahead as vanguard to Sangkhlaburi. When King Rama I had reached Sai Yok, Prince Maha Sura Singhanat moved to Sangkhlaburi. The Siamese armies concealed their movements in the jungles to stage the surprise attack on the Burmese. After long marches, the two sides finally met at Tha Dindaeng and Samsop on 21 February 1787. The fighting lasted for two days until Minhla Kyawdin was quickly defeated, again for the second time, on February 23. This short war was called “ Tha Din Daeng campaign”. Minhla Kyawdin retreated back to Payathonzu. Prince Nanda Kyawdin, upon seeing the defeat of Minhla Kyawdin, also retreated back to Martaban. The Siamese forces burnt all the Burmese grain supplies in Kanchanaburi The campaign is commemorated by a park established by theAftermath
Despite the continuation of heated conflict between Burma and Siam in the next decades, including several Siamese attempts to recapture the Tenasserim Coast and a failedSee also
* Burmese–Siamese wars * Burma–Thailand relationsReferences
{{DEFAULTSORT:Burmese-Siamese War (1785-86) Conflicts in 1785 Conflicts in 1786 1780s in Siam 18th century in Burma Konbaung dynasty Wars involving the Rattanakosin Kingdom Burmese–Siamese wars 1785 in Asia 1786 in Asia 1780s in Asia 1780s in Burma