Updated with Konigur Valdis. Armor resembles more of a Vanskerry Style, however. Anyway, here's my personal insight so far. Correct me if I'm wrong.
-I imagine the typical Empire war council is similar to that scene in Troy where the Trojan king has his generals (legatus) to the left while the lords, dukes and advisers are to the right.
-Fierdsvain are mostly all clad in chain or iron. Similar to the Ironborn in GoT.
Also, I'll be out a few couple of days. Going to the country.