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Sukhothai–Lanna Conflict

Type Event Region Southeast Asia Time 1400–1410

Around 1404 CE, the declining Sukhothai kingdom clashed with Lanna (Chiang Mai) over borders in the upper Chiang Mai River and northern Thailand unde…

Timeline

  1. 1400–1404Sukhothai · SukhothaiBy the late 14th century Sukhothai was already constrained by Ayutthaya and its central authority weakened; Lanna, under strong rulers such as Tilokaraja, expanded northward, clashing with Sukhothai over vassals and border resources.
  2. 1404–1410Chiang Mai · Chiang MaiAround 1404, Lanna and Sukhothai faced off militarily along the northern Thai border with some vassal states changing overlords; Sukhothai further sank into vassalage under Ayutthaya, while Lanna maintained independence and entered a long-term rivalry with Ayutthaya.

Sources