did not reach a settlement until 1423. The death of the hard-line Taejong in the 5th month of 1422 softened Korea's policy toward Japan. Under Sejong, Joseon relinquished its claims to Tsushima and decided to grant trade privileges to the Sō clan in exchange for its duty to maintain trade order. Aftermath according to Korean sources In 1419, King Sejong, under the advice of his father and former king Taejong, decided to attack the enemy at Tsushima while the pirates were engaged in conflict with China. In the May 1419, notice of this plan was sent as an ultimatum to the Tsushima province authorities. In the war declaration against Tsushima government, the King claimed Tsushima, known as Daemado in Korean, had degraded due to the lack of interference on pirate activities by the local authority. Korea repeated necessary involvement in the island's operations, by aiding in the recent famine and general trade route policing led the ruler to declare the land would be reclaimed by force in order to protect the integrity of the region. During the conflicts, 180 Korean soldiers were killed. In the July 1419, King Taejo sent a letter to Tsushima's Sō Sadamori laying claim to the historical repossession of Daemado (Tsushima) due to the Korean victory in war. Once again the land was Korean territory as it had been under the Kingdom of Silla. An arrangement was proposed for Tsushima to enter into a tributary relationship. In the 9th month of 1419 Sadamori sent an emissary to surrender the territory and to present a variety of tribute to the Korean court. In January 1420, a Japanese envoy visiting Seoul requested to have a copy of Tripitaka Koreana, a comprehensive Buddhist script held in great regard as a Korean national treasure. King Sejong granted the request as sign of friendship between two countries. In the 1st leap month of 1420 Sadamori requested that the island officially become a state of Korea under the name of Daemado, also promising to personally become a subject and to manage the Wokou situation as an independent act of the state. King Sejong granted this request as well as allowing Sadamori to report to Gyeongsang province rather than Seoul. See also History of Japan Naval history of Japan History of Korea Naval history of Korea Treaty of Gyehae Japanese riots in Southeast Korea (1510) References External links The annals of the Choson