Some accounts relate that he used a number of wooden lions to intimidate the population, threatening to turn them loose unless they surrendered. Usan-guk did not remain under the Silla rule, however, and the island did not become a permanent political part of Korea until 930, when it was annexed by Goryeo. Remote as it is from the Korean mainland, Ulleung-do was a recurrent security headache for the Goryeo and Joseon dynasties. It was devastated by Jurchen pirate raids in the 11th century, and by Wokou pirate raids in the 14th century. A clash with Japan over fishing rights in the 1690s was precipitated by the Korean fisherman An Yong-bok. In response to these difficulties, Joseon adopted an "empty-island" policy which however proved impossible to enforce. The empty-island policy was officially rescinded in 1881, after which the government sought to encourage additional settlement of Ulleungdo. American whaleships cruised for right whales off the island between 1848 and 1892. Some went ashore nearby Jukdo to club pinnipeds. Tourism  Favorite activities for tourists are hiking, fishing, and eating hoe (a Korean raw fish dish).
Some accounts relate that he used a number of wooden lions to intimidate the population, threatening to turn them loose unless they surrendered. Usan-guk did not remain under the Silla rule, however, and the island did not become a permanent political part of Korea until 930, when it was annexed by Goryeo. Remote as it is from the Korean mainland, Ulleung-do was a recurrent security headache for the Goryeo and Joseon dynasties. It was devastated by Jurchen pirate raids in the 11th century, and by Wokou pirate raids in the 14th century. A clash with Japan over fishing rights in the 1690s was precipitated by the korean them. An Yong-bok. In response to these difficulties, Joseon adopted an "empty-island" policy which however proved impossible to enforce. The empty-island policy was officially rescinded in 1881, after which the government sought to encourage additional settlement of Ulleungdo. American whaleships cruised for right whales off the island between 1848 and 1892. Some went ashore nearby Jukdo to club pinnipeds. Tourism 
Favorite activities for tourists are hiking, fishing, and eating hoe (a Korean raw fish dish).