Sukhothai

Sukhothai was a Thai kingdom based at Sukhothai on the upper Chao Phraya. Bang Klang Hao founded the Phra Ruang dynasty in 1238; by 1337, under Ngua Nam Thum, its tributary network was shrinking.

After Ayutthaya was founded in 1351, Sukhothai lost successive wars and became its tributary between 1365 and 1378. Its last king died in 1438, and the kingdom was absorbed as an Ayutthayan province. Sukhothai’s nobles later supplied rulers through the Sukhothai dynasty.