Navy captain Jeong Bal (정발, 鄭撥, 1553–1592) was a Joseon navy captain who commanded a garrison at Busan port. He was killed in action in 1592 while defending the garrison from elements of the Japanese vanguard, led by the Christian warlord Konishi Yukinaga. Eventually, his entire battalion was overrun and massacred by Japanese forces. He was the first high-ranking officer to be killed in combat during the Japanese invasions of Korea (1592–1598).[citation needed] He was enshrined in the Chungnyeolsa (Busan) in 1624.