You can know which wing it is based on which side of the House of Wisdom has an extra structure built on.
Rus doesn't really use a second Town Center anymore. You use a Golden Gate for resources, use the High Trade House which gives you passive resources, and you don't have to go through the extra Town centers and the stuff that Abbasid has to go through.
The Camel Archer provides unease, which is great because the Horse Archers have a decently high base damage they start at 12, so getting a couple points of that reduced could make a big difference.
For the Abbasid Dynasty going up with Military Wing, he definitely has the ability to get Composite Bows with them. Those archers fire 33% faster, and they can make quick work of Horse Archers at equal levels just because of how much damage they're able to throw out there.
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