The sectarian violence perpetrated by the group inflicted deep wounds and left a deadly trail that cut across religious, ethnic, tribal, and territorial lines. Their followers used mass-murder and weaponized rape throughout the cities and villages they controlled.The sectarian violence perpetrated by the group inflicted deep wounds and left a deadly trail that cut across religious, ethnic, tribal, and territorial lines. Their followers used mass-murder and weaponized rape throughout the cities and villages they controlled.