With only 13 ships remaining from Admiral Won Gyun's disastrous defeat at the Battle of Chilchonryang, Admiral Yi held the strait as a "last stand" battle against the Japanese navy, who were sailing to support their land army's advance towards the Joseon capital of Hanyang (modern-day Seoul). The dense formation of Japanese ships crowded in the narrow strait made a perfect target for Joseon cannon fire. By the end of the battle, approximately 30 Japanese warships were sunk. The immediate results of the battle were a shock to the Japanese command. Joseon and Ming armies were able to regroup.