The insects attacked one of the reserve units in the area of Chungcheong. As a result, 13 people were in hospital.
The victims told that they had to work out one maneuver in the forest. But when they went there for a hundred meters, they were attacked by a huge wasp swarm. According to the military, they seemed to be pricked with sharp needles. With terrible pain and dizziness, they were rushed to the hospital. The command had to interrupt the exercises.