Tamna

Tamna was the island kingdom of Jeju, off southern Korea. Annexed by Goryeo in 1105, it retained local lords. After the defeat of the Sambyeolcho rebels in 1273, the Yuan installed a military governor on the island.

The horse pastures established under Yuan rule lasted until 1356. In 1402 the last star-lord, Go Bong-rye, surrendered his title to the Joseon dynasty. The abolition of the native lords' titles ended Tamna's self-rule.