I was asking really specific things, wasn't I?

I ended up finding some books on 19th century architecture and they had some sections on native buildings in Sudan. I found nothing about the buildings that were present at the actual battles, but a ton of general stuff.
It really is "anything goes" as each individual village or family would have their way of doing things. A building with straight edged doors and windows could be right next to one with key hole shaped ones and the guy on the other side of the village might be from a family that doesn't believe in windows that people can fit or look through so they'll be slits 7 feet up the walls instead of windows. That building is going to have a solid door too while his neighbor might just have curtains.
Oh, domes on mosques are apparently a northern nile thing and when they're present in the Sudan they're the result of an Egyptian influence. They tend to have this four sided conical things in traditional Sudanese mosques. With strange fang like butresses on the walls.

This one is from Ghana but it is a great example of Sudano-Sahelian architecture
Sounds like you found multiple visual references online and were asking for more specifics, which I can't help provide for the Sudan, but I think you did a great job putting the references you found to very good use, especially with regard to the sponge finish texture for the walls of your buildings, which I love. Are they made from bass or balsa wood, foamcore, or something else?
The buildings are actually made from corrugated card board. Two thin sheets glued together with rabbeted corners:

Newsprint is then glued over the corrugation and then over the entire surface.

News print has this texture (that really gets accentuated once it's glued and dampened) which gives the impression of bricks underneath, so that worked out pretty well. Where ever the plaster/paint isn't quite thick enough they show through. You can see them under the windows on the front of the building. There's some on all sides of the buildings and between them and the plaster texture, it really hides the cardboard look.

All that said, I'm going to switch to foam core. It'll just be way less cutting and less work to hide all the downsides of card board.
really like your plaster effect, you could have a few broken buildings with ruined plaster effects, these adobe buildings are built usually with mud bricks or wattle and daub, plastered with mud and whitewashed ,
Broken buildings are on my to do list, but first I'm going to be making a bunch more buildings and walls. 5 more small buildings like this one, 2 larger buildings and enough wall sections to connect and enclose it all as a compound/fortress or make a believable town out of it. I also want to make some furniture, awnings and so forth. For the exposed brick, I found this great technique from The Crafty Goblin:
I think I saw a larger novelty pencil at the local dollar store as I'll be doing 1:32 mud bricks and the normal pencil is more appropriate for smaller bricks.
Nice looking ansar !!
Thanks!
I had read here and other places that Armies in Plastic does well with a bright colours and blacklined approach, so that's what I'm going for. I accidentally didn't let the shading dry long enough before I washed, so the ansar went a bit cloudy. Also the amount of coats needed to get that white given that I stupidly primed him with black gesso might be contributing to his cakey texture. That's the point of a test figure.

Really like that result, well done.
I think I may try your paint/spackle + brush + wet sponge method I like how that's turned out. 
I tried painting on the spackle then immediately applying paint on top mixing it in with the brush right on the wall. Then I tried premixing them and then painted them. It all pretty much turned out the same. I can't even tell you which parts got which approaches. The sponge hides all.
The buildings look great and the wall texture and colour seem perfect to me. A bit of decoration and detailing like you mentioned would seem sufficient.
I'm hoping the rough texture of the windows and doors allows for a friction fit insert. So I can make different coloured shutters and curtains. I'm probably going to go with three different door styles and three different window styles across the buildings so I can use them on more than one building. I should also do ladders and market tables and awnings and even just bright trim around some of the windows and doors.