As Thon Buri was a small town, Phya Tak's available forces, both soldiers and sailors, could man its fortifications, and if he found it impossible to hold it against an enemy's attack, he could embark the troops and beat a retreat to Chanthaburi. A concourse of the leading officials who had rallied to him offered the crown to him, and then he assumed the official name of King Boromaraja IV, but is known in Thai history as King Taksin, being a combination of his popular name, Phya Tak, and his first name, Sin, or the King of Thon Buri, being the only ruler of that capital. He never had time to build Thon Buri into a great city, as he was fully occupied with the suppression of the enemy, both internal and external, almost throughout his reign. At the sack of Ayutthaya, the country had fallen apart, due to the disappearance of the central authority. Besides King Taksin, who had organized his forces in the south-eastern provinces, Prince Teppipit, Boromakot's son, who had been unsuccessful in a diversionary action against the Burmese in 1766, had set himself up as the ruler of Phimai holding away over the eastern provinces including Nakhon Ratchasima or Khorat, while the Governor of Phitsanulok, whose first name was Ruang, had proclaimed himself independent, with the territory under his control extending to the province of Nakhon Sawan. North of Phitsanulok was the town of Sawangburi (known as Farng in the province of Uttaradit), where a Buddhist monk named Ruan had made himself a prince, appointing his qualified fellow monks as army commanders. He had himslef pursued the Buddhist studies at Ayutthaya with such excellent results that he had been appointed the chief monk of Sawangburi by King Boromakot. In the southern provinces up to Chumphon, a Pra Palad who was the actingGovernor of Nakhon Si Thammarat declared his independence and raised himself to the princely rank. Having firmly established his power at Thon Buri, King Taksin set out to crush his rivals so as to effect the reunification of the Kingdom. 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. 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 Thon Buri. 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 cound not be found again.