Although US President Donald Trump urged Turkish President Recep Tayyip Erdogan on Jan. 24 to “exercise caution and to avoid any actions that might risk conflict between Turkish and American forces,” Turkey appears committed to extending its military operations beyond the current assault on Afrin.

Two days after Trump and Erdogan spoke, the Turkish presidency announced that, following a call between Erdogan adviser and spokesman Ibrahim Kalin and US national security adviser Gen. H.R. McMaster, “no weapons would be given” to the Kurdish Democratic Union Party (PYD) and the People’s Protection Units (YPG), which would amount to a major American concession and potential turning point in the conflict.

The next day, Turkish Foreign Minister Mevlut Cavusoglu called on US forces to leave Manbij.

Turkey considers the YPG — the armed group linked to the Syrian Kurdish PYD — terrorists with ties to the Kurdistan Workers Party (PKK), which the United States has also labeled a terrorist organization. The United States has supported the Syrian Democratic Forces (SDF) as its on-the-ground partner in Syria. The SDF includes primarily YPG fighters.