NOW WHAT? In Syria, Turkey Finds Itself Boxed In.

After months of halting and costly progress, the Turkish military and allied Syrian rebels are in a good position to take the Syrian city of al-Bab from the Islamic State in Iraq and the Levant (ISIL). With the capture of al-Bab, Turkey will have accomplished the clearly defined goals of its “Operation Euphrates Shield” intervention in northern Aleppo governorate: driving ISIL from the Turkish border and blocking hostile Kurdish forces from linking their territory to Turkey’s south.

But after al-Bab, Euphrates Shield has nowhere to go, and, if Turkey’s gains are to be sustainable, its forces may be unable to leave. With Euphrates Shield, Turkey may have thrown itself into a Syrian quagmire. It has no clear exit strategy and only a poor set of options for escalation. Turkey seems committed to an indefinite but precarious occupation of a piece of northern Aleppo governorate that, perversely, may further weaken Syria’s political and territorial integrity and strengthen Turkey’s adversaries.

Getting in is the easy part.