[Uncle_Joe]

Is there a time limit for the battles and if so, then does the defender win if time runs out? What happens to the attackers?

If there is no time limit, I can see 'Mexican stand-offs' developing between human players (and with the AI if it's 'taught' to not move into firing range all the time. If there is a time limit, then the AI defenders should definitely be hanging back and forcing the attackers to move into range and thus gaining the first shot.