In 1491, when the unknown Oljeok besieged the midwives of Gyeongheung and plundered and retreated near them, Sungjong angrily ordered to go out, and the problem was that Sungjong was the strongest and most frequently invaded Joseon.But Sungjong ignored it and decided on his own, and 20,000 troops were on his way to the Mokdan River, where Joseon won, and when he reached the Mokdan River, he found that all the Nimacha Olbat had fled, and he returned without any result. Sungjong couldn’t wield power as strong as he used to be since then. In conclusion, it was a North Korean government that achieved its desired outcome, but did it have to mobilize 20,000 soldiers to attack? It’s an expedition that makes me think, “I’m just a handful of elite sportsmen, so if I’m sure they’re all right, or if they’ve solved it diplomatically, I don’t think they would’ve cursed at me either.”