Since the defeat of ISIS by the NATO-led Global Coalition and Kurdish militias in 2019, over 40,000 men, women and children have lived confined in massive camps in Northeast Syria. They are accused of being members or supporters of the Islamic State, but none of them has yet been charged or tried. The recent fall of the Syrian regime renews concerns about the use of confinement and citizenship deprivation to protect the world from the resurgence of ISIS. This project aims to produce a unique study analysing the principles and practices of extrajudicial confinement in counterterrorism.