Foreign fighters are increasingly signing up to fight ISIS on the front lines . For some of the jihadist regime 's fighters , foreign fighters are not welcome comrades . training and logistical training , some say , is the best way to continue the fight against ISIS .
Foreign fighters are increasingly signing up to fight ISIS on the front lines . For some of the jihadist group 's foes , foreign fighters are not welcome comrades . Training and logistical support , some argue , is the best way to support the fight against ISIS .