Expansion of the Sukhothai Kingdom (1240s)

Name: Expansion of the Sukhothai Kingdom (1240s)
Start: 1241
End: 1250

Type Event Region Southeast Asia Time 1241–1250

In the 1240s, under Indraditya's late reign and Ram Khamhaeng's early rule, Sukhothai expanded from its capital to Phitsanulok and Nan through conque…

Timeline

1241–1243Sukhothai city · Sukhothai ProvinceIn his final years Indraditya continued consolidating the Buddhist monastic economy and administrative system of Sukhothai's core area, weakening neighboring city-states' attachment to Angkor's suzerainty and preparing the domestic foundation for successors' expansion.
1244–1250Phitsanulok · Phitsanulok ProvinceAfter accession, Ram Khamhaeng gradually pushed northward, bringing key upper and middle Chao Phraya towns like Phitsanulok into Sukhothai's sphere, expanding his vassal network through investiture of local chiefs and military deterrence.

Sources

The Cambridge History of Southeast Asia, Volume 1 — Nicholas Tarling (ed.) (1999)
A History of Thailand — Chris Baker; Pasuk Phongpaichit (2014)