Girls can't be barbarians? I guess we could have a men's and women's horde division. But I'm not the guy who has to say, "women's horde" all day long. At some point I'd make a horrible mistake and be killed.
I would have no objection to women on the battlefield all painted up and such, the only issue I see is the men might end up stopping and watching instead of battling....... hmmmm........;-)