The set-up for the campaign is that one of my PCs was the former prince of Vallard, who was deposed in a coup (boo! hiss!) and shipped down river to a prison in the Lightless Jungle, only to escape and make his way back to civilisation.

His second cousin on his mother's side, the Empress, has very generously loaned him an army to recover his city, and the other PCs are his military and magical aides-de-camp. The campaign is thus about a besieging army and a city and the things that happen around them.