Introduction

Located 87.4km away from Ulleungdo Island, and formed entirely from volcanic rock, Dokdo is an isolated island off the east coast of Korea bearing a latitude of 37°14′ north and a longitude of 131°52′ east.
Collectively, both Ulleungdo Island and Dokdo once belonged to a country named Usanguk. According to geographical records, Usanguk became part of the Silla Kingdom (57B.C. ~ 935 A.D.) in June of the 13th year that King Jijeung ruled Silla. Isabu (a general and politician of Silla) gained significant strength during this period to overtake Usanguk.