On both sides of the Syria-Turkey border, the uncompromising strategies of Ankara, Turkey’s insurgent Kurdistan Workers’ Party (PKK), and its Syria-based affiliate, the People’s Protection Units (YPG), are propelling a dangerous conflict toward escalation.
The lone force able to head it off is the United States, and if it fails, Islamic State is ready to exploit any new disorder…
Source: Steps Toward Stabilising Syria’s Northern Border – International Crisis Group