Won Gyun
His first encounter at Okpo (1 May 1592) was a decisive victory, destroying almost half of the ships of the docking Japanese fleet. Prior to the Okpo Campaign, Yi mainly patrolled the seas near his Jeolla Province, to fortify its position before he began moving westward, due to the call for help from Admiral Won Gyun. A number of battles were fought around the area, mainly minor skirmishes.