In most of my short stories (and come to think of it, my novel) all of my warrior characters aren't warriors to begin with. Sure, I have had the occasional sociopathic assassin (which was a LOT of fun to write. Hey, Jade, if you read this- Edward RULES!), but all of my main character hero/warrior had to be thrust into the battle or action. Much like the hobbits, they did not start the actual war, and wanted nothing to do with it until it was dancing on their doorsteps.
Does that make a difference to your oppinion about female warriors? How about the idea of a world where male and female roles are switched? Just wondering.
