I actually already made a flag for the Broch, but if you make a banner I'm sure I'll find a use for it. Trees, a crescent moon, and maybe something to do with a wolf would be good, since those are three main symbols for Moon (like the wolf paw, crescent moon, and oak leaf tattoos on the Ancestral Warrior). Also, if you could make it look kinda Celtic/Norse-looking, that would be even better.
Click
here for the Broch (animated *.gif of the flag waving in the wind) and
here for the Dun (which I accidentally made last night). Note: The Dun is still a work in progress, but it's the first building I've made entirely in Blender (i.e. without starting out in AutoCAD) so that's a big step forward and I just thought I'd show it off!
Some unit icons I made a while ago:
I plan on redoing them when I make better textures for these units, but they'll work for now. I could use a good icon background for Moon, though.