Dokdo is clearly Korea's inherent territory historically, geographically, and under international law. -512, Korea's former kingdom of Silla conquered Ulleungdo and Dokdo. -1454, (records compiled by the Joseon Kingdom (old dynasty of Korea)): Ulleungdo and Dokdo are recorded as two islands belonging to Gangwon-do, and “Usan (Dokdo) and Mureung (Ulleungdo) … “The two islands are not far away fro..