The Kingdom of Thonburi (Thai: ธนบุรี ) was a Siamese kingdom after the downfall of the Ayutthaya Kingdom by the Konbaung Burmese invaders. The kingdom was founded by King Taksin the Great, who relocated the capital to Thonburi. The kingdom of Thonburi existed from 1767 to 1782. In 1782, King Rama I founded the Rattanakosin Kingdom and relocated the capital to Bangkok on the other side of the Chao Phraya River, thus bringing the Thonburi kingdom to an end. The city of Thonburi remained an independent town and province until it was merged into Bangkok in 1971.

Reestablishment of Siamese authority

left|Taksin's coronation at Thonburi (Bangkok) 28-December–1768 In 1767, after dominating southeast Asia for almost 400 years, the Ayutthaya kingdom was destroyed. The royal palace and the city were burnt to the ground. The territory was occupied by the Burmese army and local leaders declared themselves overlords including the lords of Sakwangburi, Phimai, Chanthaburi, and Nakhon Si Thammarat. Chao Tak, a nobleman of Chinese descent and a capable military leader, proceeded to make himself a lord by right of conquest, beginning with the legendary sack of Chanthaburi. Based at Chanthaburi, Chao Tak raised troops and resources, and sent a fleet up the Chao Phraya to take the fort of Thonburi. In the same year, Chao Tak was able to retake Ayutthaya from the Burmese only seven months after the fall of the city. Upon Siamese independence, Hsinbyushin of Burma ordered the ruler of Tavoy to invade Siam. The Burmese armies arrived through Sai Yok and laid siege on the Bang Kung camp – the camp for Taksin's Chinese troops – in modern Samut Songkhram Province. Taksin hurriedly sent one of his generals Boonma to command the fleet to Bang Kung to relieve the siege. Siamese armies encircled the Burmese siege and defeated them. Ayutthaya, the center of Siamese authority for hundreds of years, was so devastated that it could not be used as a government center. Tak founded the new city of Thonburi Sri Mahasamut on the west bank of Chao Phraya river. The construction took place for about a year and Tak crowned himself in late 1768 as King Sanphet but he was known to people as King Taksin – a combination of his title and personal name. Taksin crowned himself as a King of Ayutthaya to signify the continuation to ancient glories.

Reunification and expansion

There were still local warlords competing for Siam. Taksin marched first in 1768 to Phitsanulok to subjugate the Lord of Phitsanulok who ruled over Upper Chao Phraya Basin. Taksin was injured during the campaign and had to retreat. The war readily weakened Phitsanulok and then it was in turn subjugated by the Lord of Sakwangburi. The same year Taksin sent Thong Duang and Boonma to tame the Prince Theppipit – the ruler of Phimai to the north of Nakhon Ratchasima on the Khorat Plateau. The prince was a son of Borommakot and was defeated by Thonburi armies. Theppipit fled to Vientiane but was captured and then executed. In 1769, Taksin sent ''Phraya'' Chakri south to subjugate the Lord of Nakhon Si Thammarat. The lord fled to Pattani but was returned to Taksin, who reinstalled him back as the ruler of Nakhon Si Thammarat under Taksin's governance. Prince Ang Non the Uparaja of Cambodia fled to Thonburi in 1769 after his conflicts with King Narairaja for Siamese supports. Taksin then took this opportunity to request tributary from Cambodia, which Narairaja refused. Taksin sent ''Phraya'' Abhay Ronnarit and ''Phraya'' Anuchit Racha to subjugate Cambodia, taking Siem Reap and Battambang. But Taksin's absence from the capital (in wars with Nakhon Si Thammarat) shook the political stability and the two generals decided to retreat to Thonburi. By this time, the only rival to Thonburi authority was the Sakwangburi lordship led by the powerful monk Chao Phra Faang. Chao Phra Faang’s domain encompassed the northernmost territories bordering Lanna to Nakhon Sawan to the south as the result of annexation of Phitsanulok lordship in 1768. In 1770, Chao Phra Faang sent reinforcements southwards reaching Chai Nat. Taksin perceived this action as threats and decided to invade Sakwangburi beforehand. The royal fleet marched upstream the Chao Phraya River and took Phitsanulok with ease. Taksin then divided the armies into the east one led by Boonma and the west one led by ''Phraya'' Pichai to be joined at Sakwangburi. Sakwangburi quickly fell after three days and Chao Phra Faang went lost. Taksin stayed at Phitsanulok to oversee the census and levy of northern population. He appointed Boonma to ''Chao Phraya'' Surasi as the governor of Phitsanulok and all northern cities and ''Phraya'' Abhay Ronnarit to ''Chao Phraya'' Chakri the chancellor. Later in 1771, Taksin decided to finish off the Cambodian campaign by assigning ''Chao Phraya'' Chakri command of land forces with Prince Ang Non and Taksin himself went by fleet. The Siamese took various Cambodian cities and drove Narairaja out of the throne. Ang Non was installed as Reamraja and Narairaja became the Uparaja with the Cambodian court paying tribute to Thonburi.

Wars with Burma

Taksin had consolidated the old Siamese kingdom with new base at Thonburi. However, the Burmese were still ready to wage massive wars to bring the Siamese down again. From their base at Chiang Mai, they invaded Sawankhalok in 1770 but the Siamese were able to repel. This realized Taksin the importance of Lanna as the base of resources for the Burmese to attack northern territories. If Lanna was brought under Siamese control then the Burmese threats would by annihilated. At the time Lanna, centered on Chiang Mai, was ruled by a Burmese general Paw Myunguaun. He was the general who led the invasion of Sawankhalok in 1770 but was countered by ''Chao Phraya'' Surasi’s armies from Phitsanulok. In the same year, the Siamese pioneered a little invasion of Chiang Mai and failed to gain any fruitful results. In 1772, Paw Thupla, another Burmese general who had been in wars in Laos, headed west and attack Phichai and Uttaradit. The armies of Phitsanulok once again repelled the Burmese invasions. They came again in 1773 and this time ''Phraya'' Phichai made his legendary sword break.

Wars over Lan Na

In 1774, Taksin ordered ''Chao Phraya'' Chakri and ''Chao Phraya'' Surasi to invade Chiang Mai. After nearly 200 years of Burmese rule, Lanna passed to the Siamese hands. The two ''Chao Phraya''s were able to take Chiang Mai with the help of local insurgents against Burma and Taksin appointed them the local rulers: Phraya Chabaan as Phraya Vichianprakarn the Lord of Chiangmai, Phraya Kawila as the Lord of Lampang, and Phraya Vaiwongsa as Lord of Lamphun. All the lordships paid tribute to Thonburi. Paw Myunguaun and the Burmese authority retreated to Chiang Saen. During Taksin’s northern campaigns, the Burmese armies took the opportunity to invade Thonburi through Ta Din Daeng. The Burmese encamped at Bangkaeo but were surrounded by the Siamese armies commanded by Taksin in the Battle of Bangkaeo. For more than a month the Burmese had been locked in the siege and thousand of them died. Another thousand became captives to the Siamese. In 1775, there came the largest invasion of the Burmese led by Maha Thiha Thura. Instead of dividing the forces invading through various ways, Maha Thiha Thura amassed the troop of 30,000 as a whole directly towards Phitsanulok whose inhabitants were only 10,000 in number. Paw Thupla and Paw Myunguaun from Chiang Saen attempted to retake Chiang Mai but were halted by the two ''Chao Phraya''s, who after Chiang Mai hurried back to Phitsanulok to defend the city. The engagements occurred near Phitsanulok. Maha Thiha Thura directed the troops at Phitsanulok so immensely that the Siamese were about to fall. He cut down the supply lines and attacked the royal army. The two ''Chao Phraya''s decided to abandon Phitsanulok. The Burmese entered the city with victory but due to the death of Hsinbyushin the Burmese king the same year. They had to retreat. After the death of the Burmese king Hsinbyushin the Burmese were plunged in their own dynastic struggles. In 1776, the new monarch Singu Min sent Maha Thiha Thura to invade Lan Na again with such a huge army that Lord Vichianprakarn of Chiang Mai had to abandon the city. ''Chao Phraya'' Surasi and Lord Kawila of Lampang retook Chiang Mai from the Burmese but decided to left the city abandoned as there was no population to fill the city. No further Burmese invasions came as Singu staged his dynastic purges on the princes and Maha Thiha Thura himself.


In 1776, a governor of Nangrong (modern Nakhon Nayok) had a row with the governor of Nakhon Ratchasima the head city of the region. The governor then sought supports from King Sayakumane of Champasak. This became a ''casus bellum'' for Taksin to send ''Chao Phraya'' Chakri to conquer Champasak. King Sayakumane fled but was captured and detained in Thonburi for two years until he was sent to rule his kingdom again in 1780 paying tribute to Thonburi. The Champasak campaign earned Chakri the title ''Somdet Chao Phraya'' Maha Kasatseuk. Taksin invented the title ''Somdet Chao Phraya'' for a mandarin with equal honor as a royalty. In 1778, a Laotian mandarin named Phra Wo sought Siamese supports against King Bunsan of Vientiane but was killed by the Laotian king. Taksin then dispatched the troops in 1779 led by the two famous brothers commanders, Phraya Chakri and his brother, Phraya Surasi to subjugate Vientiane. At the same time King Suriyavong of Luang Prabang submitted himself to Thonburi and joined the invasion of Vientiane. King Bunsan fled and hid in the forests but later gave up himself to the Siamese. The Vientiane royal family was deported to Thonburi as hostages. Thonburi forces took two valuable Buddha images, the symbolic icons of Vientiane – the Emerald Buddha and Phra Bang to Thonburi. Then all of the three Laotian kingdoms became Siamese tributaries and remained under Siamese rule for another hundred years.


At the birth of the kingdom, Taksin only controlled a tiny part of the Chao Phraya delta. Throughout his many campaigns, he subjugated vast amounts of land. By 1769, Taksin was able to conquer territory equating to the former Ayutthaya Kingdom before its downfall, with the exception of the Tenasserim coast. Throughout his reign, King Taksin carried out his policy of expansion. In the north, Taksin drove the Burmese out of Lan Na and subjugated many local tribes, allied with the Burmese. Taksin took all of Burmese land, east of the Salween River, with the exception of the Tenasserim coast. In the south, Taksin took land from Malaysian kingdoms. These lands include: Syburi (present-day Perlis, Kedah, and mainland Penang), Terengganu, and Kelantan in Malaysia. In the east, the territory of modern Cambodia was subjugated into Thonburi territory. In the northeast, the territory of modern Laos and the territory of the Sip Song Chau Tai Confederacy was subjugated into Thonburi territory. By the end of his reign, his kingdom spanned over an area of a million km2.



Years of warfare and the Burmese invasions prevented any peasants to engage in agricultural activities. Majority of people had been deported to Burma in the fall of Ayutthaya in 1767 and the lack of manpower became the source of problems. Taksin had tried his best to encourage people to come out of forest hidings and promote farming. He promulgated the Conscription Tattooing in 1773 which left a permanent mark on commoners' bodies, preventing them from fleeing or moving. The practice continued well into Rattanakosin times until the abolition of levy itself by King Chulalongkorn later. As Taksin was from a Chinese merchant family, he sold his both royal and familial properties and belongings to subsidize the production by giving money off to people. This proved to be a temporary relief for such an economic decline. Nevertheless, the Siamese economy after the catastrophes needed time to rehabilitate. Taksin himself also commissioned trade missions to the neighbouring countries to bring Siam back to outside world, mainly with China. He dispatched several missions with tributes to the Qing in 1781 to resume diplomatic and commercial relationships.

Political and economic troubles

Thonburi began forming its society. Taksin gathered resources by wars and deals with Chinese merchants. Major groups of people in Thonburi were local Thais, ''phrai'', or 'commoners', Chinese, Laotians, Khmers, Mons. Some powerful Chinese merchants trading in the new capital were granted officials titles. After the king and his relatives, officials were powerful. They held numbers of ''phrai'', commoners who were recruited as forces. Officials in Thonburi mainly dealt with military as well as 'business' affairs. Despite Taksin's successes, by 1779 King Taksin was in trouble. He was recorded in the Rattanahosin's gazettes and missionaries's accounts as becoming maniacal, insulting senior Buddhist monks, proclaiming himself to be a ''sotapanna'' or divine figure. Foreign missionaries were also purged from times to times. His officials, mainly ethnic Chinese, were divided into factions, one of which still supported him but the other did not. The economy was also in turmoil, famine ravaged the land, corruption and abuses of office were rampant, the monarch attempted to restore order by harsh punishments leading to the execution of large numbers of officials and merchants, mostly ethnic Chinese which in turn led to growing discontent among officials. In 1782 Thonburi sent a huge army to subjugate nearby kingdoms such as Cambodia and Lao principalities again, but while they were away, a rebellion led by a powerful official broke out. The rebels eventually controlled the capital, forcing the king to step down. It is said that Taksin was allowed to be a monk. Later, the general, Phraya Chakri, the commander-in-chief of the army in Cambodia, who had wide popular support among officials, was offered the throne to King Taksin's commander in chief as he marched back from Cambodia and officially deposed king Taksin from monk-hood. Taksin was secretly executed shortly after.

Rattanakosin establishment

After the execution, the commander in chief assumed the throne of Thonburi kingdom as King Ramathibodi or Rama I. King Rama I moved his royal seat across the Chao Phraya river to the village of Bang-Koh (meaning "place of the island") which he had built. The new capital was established in 1782, named Rattanakosin. Thon Buri remained an independent town and province, until it was merged into Bangkok in 1971.

See also

* King Taksin the Great * Thonburi province * Thon Buri (district)


{{Thailand topics * Category:Former countries in Thai history Category:Former countries in Burmese history Category:Former countries in Malaysian history Category:Former monarchies of Southeast Asia Category:Former kingdoms Category:Indianized kingdoms Category:1760s in Siam Category:1770s in Siam Category:1780s in Siam Category:18th century in Burma Category:18th century in Siam Category:States and territories established in 1767 Category:States and territories established in 1782 Category:1767 in Siam Category:1767 establishments in Asia Category:1782 disestablishments in Asia Category:1760s establishments in Siam Category:1780s disestablishments in Siam