sdf. with help from a u.s.-led coalition, they drove isis from its territory, inclueing areas along the border and the de facto isis capital, raqqa. syria says ito feels threatene by advances made by syria s kurd. there s already deep seeded hostility between the government and population. in 1984, the kurdistana s work party, the pkk, which calls for kurdish aton autonomy, began an arms struggle that continues to this day. in the past 35 years, more than 40,000 people have been kill nd that struggle. now turkey considers ypg forces in syria to be an extension of the pkk in turkey, which it has declared to be a terrorist organization. in the meantime, syrian kurdish forces are holding more than 10,000 isis fighters, including 2,000 foreigners, in several