As if the murky constellation of conflicts in Syria were not tangled enough, Turkey seems poised to muddy the waters further by escalating its battle against the Syrian Kurdish-led force that is helping the United States defeat the Islamic State.

Turkish President Recep Tayyip Erdogan has for some time now been vowing to capture Manbij, a Syrian Arab town that was liberated from IS by Kurdish-led Syrian Democratic Forces (SDF) with the help of coalition air power last year. “After the liberation of al-Bab from Daesh terrorists, Turkey’s new target in Syria is Manbij,” Erdogan told reporters March 1, using the Arabic acronym for the jihadi group.

“Manbij is a city that belongs to the Arabs, and the SDF also must not be in Raqqa,” Erdogan said.

Turkish Foreign Minister Mevlut Cavusoglu chimed in March 2, saying, “We have said that we would strike if the YPG fails to withdraw.” He was referring to the People’s Protection Units, the Syrian Kurdish militia that dominates the polyethnic SDF forces. Ankara labels it a terror group over its links to autonomy-seeking Kurdistan Workers Party rebels in Turkey.