First of all I'm loving the game! Great work to all involved. A great blend of RPG and stragegy that is a worthy follow up to MoM and FFH(2)!
My specific issue that I was hoping for some advice on is that in my last two games I've had a problem with powerful neutral armies that have been "popped" by the AI (but appear to have not caused them any trouble, do neutrals not attack AI?), and start wreaking havoc after I conquer the AI territory.
In both cases I was playing "hard" and was on an early offensive against an AI with mounted spearmen/archers. Nice stuff for knocking out city defenders and "strong" or weaker neutrals, but just fodder to the big dragons. I get not to pop these mobs with the borders of the towns I found, but when I conquer one the AI has often already build the boarder expanding buildings, and once the dragon is on the loose they seem pretty much unstoppable for my primitive armies.
Is there some trick to either taking these dragons out early, or preventing them from laying waste to your cities?