The northeastern city of Hasakah is one of the most ethnically and culturally diverse in Syria. Its population of Kurds, Sunni Arabs, and Christians was until recently politically divided between equal zones of Kurdish and Assad regime control. Immediately following the fall of the strategic border town of Tal Abyad from Islamic State (IS) fighters to Kurdish YPG forces in June, however, IS hit back with a sudden shock offensive on the regime-held half of Hasakah, causing regime forces to crumble in a matter of days.