It seems the most successful fighters right now against ISIS in Mosul are the Iranian Militia, who actually know how to fight...they are gaining ground within the city from their angle of entry...and they will never ever give their gains back...(this was all, before the separations, all Persia...their country)whilst Iraqi-American army trained folk are regrouping with their state of the art weapons after getting a bit of a thump in the face from ISIS. ISIS knows how to fight too...and ISIS will fight because Mosul is an Iraqi city and ISIS are... Iraqis....Iraqis who we don't like, mind you...but Iraqis...and people do get a bit pernickety and recalcitrant about surrendering their homeland for some strange reason.