Jeju during the Goryeo Dynasty

Goryeo, which was established in 918, acknowledged the Tamna and conferred the title of minister to its head. Then, in 1105, Tamna became a Gun, one of Goryeo’s administrative units and lost its position as a nation. In 1295, it changed its name to Jeju, which meant “the village across the sea.” During the anti-Mongol struggle at the end of the Goryeo Dynasty, Sambyeolcho, a military unit of Goryeo that fought against the Mongolian army, Jeju as its last bastion. The resistance movement came to an end in 1273 and Jeju fell under the rule of Yuan Dynasty’s Tamna Commandery.