Quote Originally Posted by Kobal2fr
The explanation most people resorted too when the game came out was "huh ?!... well, must help with the unit caps. You get twice as much of these guys as your neighbour(s)". Which is a teensy bit bogus if you ask me.
This made me take a second look, and I think I found a reason for it.

The Nubian spearmen are the only castle spearmen for the Egyptians (unless you count dismounted Arab cavalry). Their only other spear units are militia. So, I think the unit was more designed for the Egyptians than the Moors.

I think it is simply because the Moors and the Egyptians are both north African factions, so the designers just included them with the Moors as well. It might be as easy and silly as that.

It still doesn't explain Dismounted Boyars Sons and Dismounted Druzhina, though...