 The city of Deir ez-Zor was split between President Bashar al-Assad's forces and an amalgam of rebel groups.In 2014 ISIL forces massacred an estimated 900 members of the Al-Shaitat tribe in the governorate, following resistance to the group's control of the area.In early 2016, the forces of the Syrian Democratic Forces entered the governorate following the Al-Shaddadi offensive.