Mosul and Raqqa come as pair- along with Tal-Afar. That remnants of the Eastern syria regime are against ISIS as well is incidental.
Right now at least 1000 Marines are outside Raqqa to deconflict Turkey with the YPG- which is aligned with us. Hope that Russia is not correct about he YPG being too aligned with the PKK.
Turkey is in NATO...if there is any "deconfliction" to be done...do you even know what that word means?...it needs to be done in Brussels or at SHAPE HQ...not on an ambiguous ever shifting battlefield
Your triangulation of two Iraqi cities with a city in Syria make as much sense as a football bat.
Those marines don't need to be there right now. We have no business being in Syria.