Borommaracha III

Borommaracha III continued the administrative and social reforms initiated by his father Trailokanat, particularly the sakdina system. He extended the system's application to newly conquered territories and refined the ranking of officials, further entrenching the hierarchy in Ayutthayan society.

Borommaracha III led military forces to suppress rebellions in the northern provinces of the kingdom, which had been annexed during Trailokanat's reign. The campaigns restored royal authority and prevented the fragmentation of the expanded territory, though they required significant military expenditure.

Borommaracha III sent a tributary mission to the Ming court in China, reaffirming Ayutthaya's subordinate relationship under the Chinese tributary system. This diplomatic engagement secured trade privileges and maintained peaceful relations with the powerful Ming Empire, benefiting Ayutthaya's economy.