Tamna [SEP] end time
Tamna
The state of Tamna or Tamna-guk ruled Jeju Island from ancient times until it was absorbed by the Korean Joseon Dynasty in 1404. This kingdom is also sometimes known as Tangna (탕나), Seomna (섬나), and Tammora. All of these names mean "island country".
Legends of founding.
There is no historical record of the founding or early history of Tamna. One legend tells that the three divine founders of the country—Go (고), Yang (양),
claims that Juho was a small island in the Yellow Sea. Tamna is pronounced Dānluó (Wade-Giles: Tan-luo) in Standard Mandarin Chinese.
In 476, according to the "Samguk Sagi", Tamna entered into a tributary relationship with Baekje, which controlled the southwestern Korean peninsula as Tamna gave military aide with some sort of money, and enjoyed strong ties with Japan. It was thus a natural partner for Tamna. As Baekje waned, Tamna turned to Silla instead. At some point near the end