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|Borommarachathirat I |
|King of Ayutthaya|
|King of Siam|
As the lord of Suphanburi, a powerful rival of Ayutthaya, he forced King Ramesuan from power and took the throne of Ayutthaya. Known as a great warrior, his reign marked the expansion of Ayutthaya to the north. He suppressed a rebellion in Sukhothai Kingdom (1371-78) and subjugated major northern powers such as Phitsanuloke. Invading Chiengmai, his forces were defeated and repulsed at the Battle of Sen Sanuk, near Chiengmai.
After his death in 1388, his son, Thong Lan reigned for only a week. Ramesuan, who had previously retreated to Lavo, returned and toppled him. Ramesuan eventually assumed the throne, as the king for the second time.
- Chakrabongse, C., 1960, Lords of Life, London: Alvin Redman Limited
- p. 431, 'The Collins Encyclopedia of Military History' (4th edition), Dupuy & Dupuy, 1993.
Borommarachathirat IBorn: ? Died: 1388
| King of Ayutthaya