In what format? What structure? Is it going to be a blob or a mob? Or are they talking in total Iraq — spread among the various districts. Cause you know the logistics of sustaining and supporting 20k in the field is huge when you have to dodge drones and airstrikes.
I suspect most of them find themselves with drones to their left and Mohammed with a beheading scimitar to their right.
Their devotion is probably heavily influenced by their impression of which one will remain closer to them.
It’s good to remove ourselves from the area, so the bad guys expose themselves and begin to mass, presenting more viable targets. It’s bad to not have our boots on the ground, because their numbers will swell without our immediate lasting presence.