On Oct. 22, Turkish President Recep Tayyip Erdogan and his Russian counterpart Vladimir Putin held a meeting in Sochi, Russia, agreeing on the parameters of the proposed Turkish safe zone in northern Syria. The deal stipulates that the Kurdish militia of the SDF and its broader umbrella of the People's Protection Units will pull back 30 km south of Turkey's border within 150 hours. Joint patrols by Turkish and Russian forces will cover the area, according to the deal.