Ariana Grande Concert — Itaewon Halloween Crush (Seoul, 2022)

This event represents the deadliest crowd crush in South Korea’s recent history, killing 159 people. A post-disaster review revealed that police deployed fewer than 140 officers for a district packed with 100,000 revelers—a staffing ratio 80% lower than standard protocols for similar urban festivals. Despite clear crowding signals by early evening, no crowd control measures or traffic diversions were implemented, a failure that ranks as more catastrophic than the 2023 Seoul Halloween crowd surge in terms of sheer oversight. The absence of monitoring cameras or emergency response coordination meant that victims lay trapped for over 40 minutes before rescue began. This negligence marked the worst police planning failure for a public event in South Korea since the 2014 Sewol ferry disaster.