The decision of the US finally to punish Bashar al-Assad for the use of chemical weapons against civilians will turn out to be, no doubt, a catalyst for a new chapter in the Syrian conflict. Even though US officials repeatedly emphasised the missile strikes on the Shayrat airfield were a one-off punitive measure, the unprecedented move comes amid a set of turning points in different parts of Syria and in the way foreign actors operate there. It is against the backdrop of these changes that the regime’s logic behind the use of chemical weapons should be viewed.