The Japanese vanguard was the army under Konishi Yukinaga and Sō Yoshitoshi, followed by the army of Kato Kiyomasa and the army of Kuroda Nagamasa. The Japanese forces arrived at the Imjin River without difficulty, but found that the Koreans had finally managed to mount an effective defense, and had 10,000 soldiers amassed on the far bank under the command of Gim Myeongweon. Seeing that the Koreans would not budge after waiting for ten days, the Japanese forces conducted a false retreat to lure them into attacking. The Koreans took the bait and one inexperienced commander Sin Hal immediately ordered his men to cross the river and attack the Japanese. A portion of the Korean army thus crossed the river and rushed past the abandoned Japanese campsite into the ambush. The Japanese fired on them with muskets and chased them to the river where they were slaughtered. The Japanese crossed the river by 7 July and took Kaesong without a fight. Afterwards the three divisions split up. Konishi Yukinaga went north to Pyeongyang, Kuroda Nagamasa went west to Hwanghae, and Katō Kiyomasa headed northeast to Hamgyeong.