Taksin's reunification of Siam File:Phrayatakjourney.jpg|Journey of
Phraya Tak from
Ayutthaya to
Chanthaburi and his return to
reconquer Ayutthaya in 1767, according to traditional Thai historiography. File:1767 Separate Factions of Siam.png|The five states that emerged following the dissolution of the Ayutthaya Kingdom in 1767.
Phraya Tak, personal name Sin, Zheng Zhao (鄭昭) By the time of
Burmese Invasion of 1765-1767, Phraya Tak had been the governor of
Tak and called to join the defense of Ayutthaya. There, Phraya Tak competed with Pu Lan the Phraya Chanthaburi or the governor of
Chanthaburi for domination over the eastern coastline. In the famous episode, Phraya Tak ordered all cooking pots in the supplies to be destroyed and then successfully took Chanthaburi in June 1767. Phraya Tak established his dominions of influence on the eastern coast stretching from Bang Plasoi (
Chonburi) to
Trat. Ayutthaya fell in April 1767. Due to the intervening
Sino-Burmese War, Burma was obliged to divert most of its forces from Ayutthaya to the Chinese front. To the north,
Chaophraya Phitsanulok Rueang made his base in
Phitsanulok, while the heterodox monk
Chao Phra Fang to the
Chao Phraya. He took Thonburi and proceeded to attack the Burmese at Phosamton in November, defeating the Burmese commander Thugyi or Suki. and Siam was unified at last.
Invasion of Cambodia and Hà Tiên In the eighteenth century, the port city of
Hà Tiên, ruled by the
Cantonese Mạc Thiên Tứ, arose to become the economic centre of the
Gulf of Siam. After the fall of Ayutthaya, two Ayutthayan princes: Prince Chao Sisang and Prince Chao Chui, took refuge at
Oudong the royal city of Cambodia and Hà Tiên, respectively. The
Qing Chinese court at
Beijing refused to recognize King Taksin as the ruler of Siam in Chinese tributary system because Mạc Thiên Tứ had told Beijing that the remaining descendants of the Ayutthayan dynasty were with him in Hà Tiên. In 1769, King Taksin urged the pro-Vietnamese King
Ang Ton of Cambodia to send tributes to Siam. Ang Ton refused and Taksin sent armies to invade Cambodia in 1769 but did not meet with success. In 1771, Taksin resumed his campaigns to invade Cambodia and Hà Tiên in order to find the Ayutthayan princes and to put the pro-Siamese
Ang Non on the Cambodian throne. King Taksin ordered Phraya Yommaraj Thongduang (later King
Rama I) to bring the army of 10,000 men to invade Cambodia by land, while King Taksin himself with
Phraya Phiphit Chen Lian (陳聯, called Trần Liên in Vietnamese sources) Ang Ton resumed his rule in Cambodia. With the Vietnamese support dwindling due to the Tây Sơn uprising, however, Ang Ton decided to reconcile with his rival Ang Non and with Siam. Ang Ton abdicated in 1775 in favor of Ang Non, who became the new pro-Siamese King of Cambodia. or the ruler of Siam in 1777 in the Chinese tributary system.
Conquest of Lanna After the Burmese conquest of
Lanna (modern
Northern Thailand) in 1763, Lanna including
Chiang Mai returned to the Burmese rule.
Thado Mindin the Burmese governor of Chiang Mai oppressed the local Lanna nobles. King Taksin marched against the Burmese-held Chiang Mai in 1771 but failed to take the city. In Chiang Mai, Thado Mindin faced opposition from Phaya Chaban Boonma, the native Lanna noble who led the resistance against Burmese domination. In 1772, King
Hsinbyushin of the Burmese
Konbaung dynasty realized that Siam had recovered and arose powerful under Thonburi regime. Hsinbyushin initiated a new campaign against Siam. He ordered troops to be gathered in Burmese Chiang Mai and the
Mon town of
Martaban in order to invade Siam from both the north and the west in two directions: a similar approach to the invasion of 1765-1767. of Lampang, vassal lord of Lampang to Taksin and the first two Chakri monarchs, helped to repopulate Lan Na in the late 18th-early 19th centuries The Burmese forces from Chiang Mai attacked the Northern Siamese border towns of
Sawankhalok in 1771 and
Phichai in 1772-1773. King Taksin marched to Tak where he received the Mon refugees. Taksin ordered
Chaophraya Chakri to lead the vanguard to Lampang, where Kawila had earlier insurrected against the Burmese. Burmese captives from this battle. 's
invasion of Siam in 1775–1776 was the largest and most intense
Burmese-Siamese War in the Thonburi Period, King
Ong Boun of Vientiane had been a Burmese ally, as he instigated the Burmese to invade his rival Luang Phrabang two times in 1765 and 1771. King Taksin had been suspicious about Ong Boun being in cooperation with Burma. In 1777, the governor of
Nangrong rebelled against Thonburi with support from
Champasak. King Taksin ordered Chaophraya Chakri to lead the Siamese armies to invade and retaliate against Champasak. After this expedition, Taksin rewarded Chakri with the rank and title of
Somdet Chaophraya Maha Kasatsuk. The rank of
Somdet Chaophraya was the highest possible a noble could attain with honors equal to a prince. In 1778, Phra Vo, All three Lao kingdoms of Luang Phrabang, Vientiane and Champasak became the
tributary kingdoms of Siam on this occasion. In May 1781, Taksin dispatched his first and only official tributary mission to China. led by Chaophrayas Chakri and Surasi, to fight the Vietnamese forces of
Nguyễn Phúc Ánh to restore Siamese influence in Cambodia and to install his own son Inthraphithak as new King of Cambodia. He burnt a court lady alive, suspecting that she had stolen from his treasury and falsely punished around three hundred people, for their alleged smuggling of rice and salt, at the instigation of two corrupted officials. Chinese merchants had to renounce almost all commerce, some were even killed. In March 1782, a rebellion broke out against Taksin in Ayutthaya due to conflicts over treasure digging rights. King Taksin sent Phraya San to quell the rebellion. However, Phraya San instead joined the rebels and returned to attack Thonburi. With most of his troops away in Cambodia, Taksin relied on Portuguese gunners to defend him, who would soon abandon the king. Taksin surrendered. Phraya San forced Taksin to abdicate and become a monk at Wat Arun with Phraya San taking control in Thonburi. Chaophraya Chakri in Cambodia, informed about the incidents, assigned his nephew
Phra Suriya Aphai to lead armies from
Nakhon Ratchasima to pacify Thonburi. Phraya San ordered Taksin's nephew Prince Anurak Songkhram to attack Phra Suriya Aphai at
Bangkok Noi in the Battle of Bangkok Noi in April 1782. Phra Suriya Aphai was about to be overrun by Phraya San's forces when Siri Rochana, Lanna wife of Surasi, appealed to Binnya Sein the Mon leader to assault Prince Anurak Songkhram in the rear, allowing Phra Suriya Aphai to prevail with Phraya San's army retreated. Chaophraya Chakri, having brokered a truce with the Vietnamese, marched to return to Thonburi. He convened a judicial court to try Taksin and Phraya San of their wrongdoings. Taksin was executed for his "improper and unjust actions that caused great pain for the kingdom". Phraya San, his supporters and Thonburi loyalists, total number of 150 people, were also executed. Taksin's son Inthraphithak, Taksin's nephews Anurak Songkhram and Prince Ramphubet were executed but his other young children were spared and allowed to live. Chaophraya Chakri ascended the throne as King
Rama I, founding the new and current-ruling
Chakri dynasty of the
Rattanakosin Kingdom in April 1782. ==Government==