US President Donald Trump’s decision to pull out of the Iran nuclear deal has added new complications for Turkey’s two overriding quests in Syria: to see the Kurdish People's Protection Units (YPG) defeated and President Bashar al-Assad and his regime ousted. These two aims were already headed toward incompatibility in the crosscurrents that have shaped this crisis.
Turkey, determined to stand against the American-supported YPG, launched an operation against the group in January in Afrin, disregarding not just US but international disapproval.