※ Dokdo was originally under Usan’s rule. Who ruled Usan during the Three Kingdoms period?[Answer]
※ Which text contains Dokdo territorial records of the Goryeo period?[Answer]
① History of Goryeo
② History of the Three Kingdoms
※ New and Expanded Complete Conspectus of the Territory of the Eastern Country, compiled during the Joseon period, identifies Dokdo as being in which province?[Answer]
Ulleungdo and Dokdo were in the country of Usan prior to the Three Kingdoms Period. The country of Usan was under the rule of the Silla government during the Three Kingdoms Period. Dokdo was Korean territory throughout the Goryeo and Joseon periods. Such information can be verified in various historical sources. Goryeo period: History of Goryeo; Joseon period: Annals of the Joseon Dynasty, The Annals of King Sejong Geographical Records, New and Expanded Complete Conspectus of the Territory of the Eastern Country, and other historical sources.