General Yi Jong-mu first sent captured Japanese pirates as emissaries to ask for surrender. When he received no reply, he sent out expeditionary forces, and the soldiers proceeded to raid the islanders and pirates and plunder pirate settlements. According to "Veritable Records of the Joseon Dynasty" a Korean history book, in the battle of June 20, the Korean army captured 129 "wokou" ships, burned 1939 houses, killed 114 people, captured 21 people, and rescued 131 Chinese who were captured by the "wokou". On June 29, they burned 15 "wokou" ships and 68 houses, killed nine people, and rescued 15 people, including Chinese and Koreans, who had been held captive, but more than a hundred soldiers were killed by "wokou". In the record of July 10, the number of soldiers killed by "wokou" was rectified to 180. On the other hand, according to historical documents recorded by the Sō clan, the death toll of the Korean army was 2500.