Re-education camp (Vietnam)
Re-education camps (Vietnamese: Trại cải tạo) were prison camps operated by the communist Việt Cộng and Socialist Republic of Vietnam following the end of the Vietnam War. In these camps, the government imprisoned at least 200,000–300,000 former military officers, government workers and supporters of the former government of South Vietnam.
Source: Wikipedia — Re-education camp (Vietnam) (CC BY-SA 4.0)