Samchung re-education camp
The Samchung re-education camp was a South Korean concentration camp set up during the early 1980s under the rule of military dictator Chun Doo-hwan. More than 60,000 people—with estimates up to almost 100,000 people, many of them innocent civilians—were arrested without warrants and faced violent treatment in such camps.
Source: Wikipedia — Samchung re-education camp (CC BY-SA 4.0)