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).
Some Korean accounts of the war say that Jeong fled the battle rather than fight, but the accepted version is that he stayed and died fighting the invaders. Nanjungjaprok contains the witness reports of survivors of the Siege of Busan, in which the survivors claimed that Jeong stood his ground instead of running. There is a statue of him defending the city in the centre of Busan.