Re: Where do you prefer to fight a battle when you are at disavantage in terms of numbers? In the open or inside a city?
Usually, like LuckyPistol and Gyrosmeister, I'd prefer a city.
Of course, not every faction would rely choke points for defence. If I was playing as a faction which relies mainly or only on cavalry (a Nomadic Tribe), a flat open plain could be better. If my faction relied on stealth and hit and run attacks (such as the Suebi or Lusitani, possibly), a forested open map might work better. If I had archers and my enemy had slingers, a hilly map would be useful (although a city map would work well too).