Ayutthaya’s King Borommaachathirat again besieges Kamphaeng Phet…
1378 CE
Ayutthaya’s King Borommaachathirat again besieges Kamphaeng Phet in 1378 and compels Sukhothai’s King Sai Lu Thai agrees to peace terms, surrendering and ceding western areas, including Kamphaeng Phet, to Ayutthaya.