Amid the ongoing chaos in Syria following the fall of Bashar al-Assad, fears are mounting regarding a potential resurgence of the Islamic State (ISIS). The Kurdish-led Syrian Democratic Forces (SDF), a key U.S. ally, have halted anti-ISIS operations due to threats from Turkey-backed rebel groups, prompting warnings from commanders about the increased likelihood of ISIS attempting a comeback. Analysts indicate that the existing power vacuum in Syria could allow ISIS to exploit the situation, raising alarms not only for regional stability but also for the security of Europe and beyond. The U.S. has expressed concern that the ongoing conflict and shifts in power dynamics could facilitate extremist activities, with experts predicting a potential spike in terrorism as the political landscape evolves.