Joint Chiefs spokesman says plan ` ` is not a change in mission nor is it a new role '' U.S. currently has advisers assisting Iraqis in Irbil and . U.S. officials maintain that Iraqi support for Sunni tribes going on the offensive against ISIS will be a necessary part in the effort to defeat the militants , who are also called ISIL and refer to themselves as the Islamic State . Joint Chiefs said : Sunni tribes fighting ISIS need Iraqi military support . ISIS has killed some 400 members of one Sunni tribe in Iraq in recent days .
Joint Chiefs spokesman says plan ` ` is not a change in mission nor is it a new role '' U.S. currently has advisers assisting Iraqis in Irbil and . Joint Chiefs said : Sunni tribes fighting ISIS need Iraqi military support . ISIS has killed some 400 members of one Sunni tribe in Iraq in recent days .