In June 2014, ISIL had at least 4,000 fighters in Iraq,[REF] and the CIA estimated in September 2014 that it had 20,000-31,500 fighters in Iraq and Syria [REF].
Despite thousands of foreign volunteers, Reuters has stated that according to jihadist ideologues 90 percent of ISIL's fighters in Iraq are Iraqi and 70 percent of its fighters in Syria are Syrian [REF].