Riverkeep
"Very well. There's a small riverling to the south. There's a pass a few miles down the waterway but at this time of the year it's a muddy marshland. Going around the waterway would take days and the surrounding land is too muddy to be fertile right now, so food would be hard to come by. Supply train wagons won't do in the mud; in short, Galt will have to ford the waterway or come across from the river. River galleys are protecting that method of entry, though, and there are no reports of naval aggression, so I highly doubt he will attempt to come from the river. After the waterway it's a short stretch of farmland, plains, and villages until they come upon Porte. In the event of siege, we usually have a way of supplies via the north river but harassment around Saxum has clipped our imports. Riverdale isn't sending supplies, claiming to have been alienated from the crown due to an assassination or some such. That said, we could hold out for a time, but I believe Galt is marching for expediency and will storm our walls. Our garrison, due to the influx of lords and ladies from the countryside, is close to a thousand strong but that won't hold against Galt. Local mercenary companies have been bought by the rebels using the abundance of wealth in Central. If we are going to survive we need help from the crown."