Quote Originally Posted by Procrustes
Hi,

One big advantage of any upgrades is that when the province changes hands after an assault the fortification will generally be degraded one level. If it has an upgrade, the upgrade disappears but you still have the fortification - otherwise the fortification is knocked back one level. (Will cost you a lot more to rebuild.)

Best,
That doesn't always happen does it? I could've sworn that the chances decrease the higher up the tree you build, and the less likely it is that other buildings are destroyed when the castle is taken?

I like the trick with the bait unit! I'll have to try it the next time.