Taksin's reunification of Siam

Taksin's reunification of Siam
Map of the five Siamese states (including their capital cities) that emerged following the dissolution of the Ayutthaya Kingdom in 1767
Date 1767–1770/71[1][2][a] Location Siam Result Thonburi victory. Reunification of Siam under the Thonburi Kingdom.
Belligerents
State of Thonburi (Thonburi Kingdom)	State of Phimai State of Phitsanulok State of Sawangburi State of Nakhon Si Thammarat Principality of Banteay Mas (Hà Tiên) Konbaung Dynasty (Burma)
Commanders and leaders
Taksin Chao Phraya Chakri Chao Phraya Surasi Phraya Phichai Phraya Chaban Phraya Kawila Phraya Vaiwongsa	Thepphiphit   Chaophraya Phitsanulok (Rueang Rochanakul) † Chao Phra Fang (MIA) Phra Chao Khattiyarachanikhom (POW) Mạc Thiên Tứ Maengki Manya
Strength
Unknown	Unknown
Casualties and losses
Unknown	Unknown

Following the Sack of Ayutthaya and the collapse of the Ayutthaya Kingdom (1351–1767) during the Burmese–Siamese War (1765–1767), a power vacuum left Siam divided into 5 separate states—Phimai, Phitsanulok, Sawangburi, Nakhon Si Thammarat, and Thonburi. The Burmese invasion force, having returned to Burma off their successful sack of Ayutthaya and to defend its homeland against an imposing Chinese invasion of Ava, were too preoccupied to take advantage of the power vacuum in Siam.

The state of Thonburi, led by Taksin, prevailed, subjugating its rivals to successfully reunify Siam under the Thonburi Kingdom (1767–1782) by 1770/71.^[3][4][a]

To defend his flanks against a future Burmese invasion, Taksin later invaded Lan Na while Hsinbyushin sent small invasion forces to counter Taksin's military operations. Taksin, however, succeeded in driving back the small Burmese invasions and captured Lan Na in 1775, leading to the dying Hsinbyushin to send one last major military expedition to destroy Thonburi in 1775-76.

This second wave of Burmese-Siamese warfare would not end until the early 19th century, depopulating much of Siam while Taksin secured a militaristic Siamese successor state to the Ayutthaya Kingdom at the new Siamese capital of Thonburi (later known as Bangkok).

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