a princely rank. Having firmly established his power at Thonburi, King Taksin set out to reunify the old kingdom, crushing regional rivals. After a temporary repulse by the Governor of Phitsanulok, he concentrated on the defeat of the weakest one first. Prince Teppipit of Phimai was quelled and executed in 1768. Chao Narasuriyawongse, one of Taksin's nephews, was substituted for him as governor. The last so-called ruler who still challenged the King was the Prince of Sawangburi or Chao Pra Fang, as he had just annexed Phitsanulok on the death of its Governor. King Taksin himself led an expedition against him and took it, but the prince disappeared and could not be found again. In dealing with the Prince of Nakhon Si Thammarat, who was taken prisoner by the loyal Governor of Pattani, the king not only pardoned him but also favoured him with a residence at Thonburi. In Thonburi period, the beginning of the Chinese mass immigration fell to Siam. Through the availability of Chinese workers, trade, agriculture and craftsmen flourished. However, the first Chinese rebellions had to be suppressed. However, later due to stress and many factors, King Taksin went mad. After a coup d'état removing Taksin from power was restored by General Chakri (later becoming Rama I), Taksin was sentenced to death on Wednesday, 10 April 1782. Restoration under Rama I A noble of Mon descent, General Chakri succeeded Taksin in 1782 as Rama I, the first king of the Chakri dynasty. In the same year he founded a new capital city across the Chao Phraya River in an area known as Rattanakosin Island. (While settlements on both banks were commonly called Bangkok, both the Burney Treaty of 1826 and the Roberts Treaty of 1833 refer to the capital as the City of Sia-Yut'hia.) In the 1790s, Burma was defeated and driven out of Siam, as it was then called. Lan Na also became free of Burmese occupation, but was reduced to the Kingdom of Chiang Mai. The king of the new dynasty was installed as a tributary ruler of the Chakri monarch. After the coup of removing Taksin, it is probable that Chakri and his family had planned the ascent to the throne already during his predecessor Taksin. After his coronation, he operated a systematic bloody extermination of the followers of Taksin, which corresponds to the typical approach of the usurpers in Thai history. The new