Airborne Units? Is this possible?

[Isaacdaninja]

I was wondering if you could make airborne units in RTW. Is so how? Those of you who have played Kingdom Under Fire: The Crusaders, an Xbox RTS game similar to Rome in a few ways had a few units like dragon like things, storm riders and more and it's done very well. Archers actually aim for each indivigal eagle or whatever.

So how would you create them with archers firing up at them in the sky?
Is it possible?

[CtrlAltDelete]

try and make a invisible mount unit then another unit that is the rider and it should look like it's flying, but archers and infantry would attack the invisible mount unit