Al-Sina Prison, northeastern Syria, territory controlled by the Kurdish SDF with American support. Battle of al-Hasakah: A coordinated attack by a large group of ISIS members leads to a revolt and the escape of hundreds of prisoners from the prison. The intervention of SDF forces leads to the killing of 114 ISIS members for a total of 166 deaths, including escapees, and the arrest of another 550 ISIS members. SDF casualties are 45 and ISIS takes 27 hostages.
