SciFi90 wrote: Mr. Weber may provide that the supply route to provide food and arms to the Harchong soldiers army be cut, or severely restricted. (As I have noted elsewhere, the arming of a skimmer with guns to destroy the ship carrying the Thirsk family would allow it's use to blow up supply- and arms-dumps furnishing the Harchongese).
This I find unlikely, mainly due to Merlin choosing to carry out pretty much all his killings in person. In addition the reprisal attacks the inquisition would launch are a good deterrent versus Merlin.
That MWW mentions the possibility of the Langhorne Canal being cut in text does indicate possible foreshadowing. Given how intelligent Rainbow Waters is I doubt he would let it happen, to the point of ignoring Clyntahn orders to hold fast. My guess is Charis using the navy to support a force traveling north on the Sabana River. One small enough to withdraw entirely, with ironclad support would be a threat the HoGaA has to deal with. Given Clyntahn's unwillingness to retreat it could pose a challenge for the HoGaA to deal with while not pissing Clyntahn off.