double
Okay, so I completely failed to come up with anything whatsoever. I'll have a think about how to manage the transition between here and the next big action-y bit while I'm at work tomorrow.
EDIT: Turns out I'll need to wait for Iota to be told (by someone other than Steren) to lower her weapon, or at least do something with it that doesn't involve shooting Andreas in the face. :X
Assuming that the group's going to bundle into at least one of the vehicles plus Steren's half-track thereafter, there's enough fuel in the trucks/armoured cars, combined, for one truck plus the half-track to go as far as we need to go, and let's assume the Salamander's got a few spare jerry cans in the back as well. We already know Andreas can drive (I think I enumerated the list of things he can't do, either in this thread or over Skype) and I'm hoping that either Nogal or Pantariste knows what to do with a ground vehicle as well.
In case anyone's curious, Portiswade was the closest city but I think the bombers over that way already wiped it off the map, as is technically still happening to Coveton*. Stonechapel's about a fourteen-hour drive away by tank (or six and a half hours by land-train), with other cities being a bit too far away for even a Hover Espace to cover in any reasonable amount of time.
Zagan's grand cruiser is in low orbit by now, by the way, so will be sort of visible to Steren and anyone with magnoculars if the sky's clear. (Keeping in mind that "low orbit" goes out to two thousand kilometres above sea level, Zagan is still very definitely in space -- he's not going to suddenly drop into Sathvairg's atmosphere on his own volition.)
*Although the bombers over both cities are long gone and have probably headed back to Zagan's ship to refuel, let's not forget that most of Coveton is still on fire...