ANKARA The Syrian National Army ( SNA ) continues its operation in Manbij against the PKK / YPG terrorist organization, having already taken control of 80 percent of the city in Syria ’s north, Turkish security sources said on Dec. 8. Following the opposition groups’ advance to overthrow Bashar al-Assad 's regime, the government forces withdrew from certain areas, ceding them to PKK/YPG. To prevent the creation of a “terror corridor,” the Ankara-backed SNA launched Operation Dawn of Freedom,