I'm not an experienced modder so I don't know if this is something that can be changed.

Is it possible to make it so both the player and the AI can't build city wall fortifications? There are WAY too many siege battles for this time period. I also want to make it so wooden forts are the only forts you can build. Is it possible to mod both of these things?

Thanks. +Rep to anyone who can tell me how to do this.