Quote Originally Posted by Denizar
Thats indeed a very good point.

I wonder if there are connections between the layers of wall so that once you get your men on the first ring, they can walk their way to the inner ring. Or will we have to get them on walls, then on ground again, then on the second layer, then on ground again, and then the third layer? If so, how will we get ladders and siege towers to the second and third rings? Does this mean we have to knock down walls, no towers or ladders will work?

Will the tunnel digging guys be able to crush down the entire wall system at once or one layer at a time? Will we have the chance to dig a tunnel into the city so that we can get our men through the tunnel inside? Which is what happened in certain battles in history. Maybe having a spy inside the city could let you have this possibility.
I see your point, but if the enemy use the siege towers or ladders to get up on first ring, then they can walk at connections and then take the whole castle without any problems. And if that is the case why make three wall rings.