Hi, Hoel.
First of all (and I'll get around to thanking you in my thread), thanks for your advice on defensive structures for my Kimarnock's Ruhba map. I appreciate your advice and certainly will be implementing some of it.
Your advice and this thread has gotten me thinking about defensive structures in general and I've created a PDF document in which I have detailed six different types of defensive structures. The information was take from Wikipedia and reformatted.
The defensive structures detailed are as follows:
Bastion
Barbican
Defensive Walls
Gatehouse
Redoubt
Towers (both Castles and Tower Houses)
I certainly hope that you and others will find this information useful.
Regards,
Gary