The Syrian Democratic Forces (SDF), America's local partner in northeastern Syria, was instrumental in the fight against ISIS and is working to fill the vacuum it left behind. In this episode of Overwatch, ISW's Research Director Jennifer Cafarella, new Middle East Portfolio Manager Nicholas Heras, and Syria Research Assistant John Dunford discuss the structure and behavior of the SDF, the group's relationship with the US military, the unique challenges it faces in governing, and its efforts to prevent the resurgence of ISIS within local populations.