Not to mention that NO amount of uneven ground whatsoever will make your impregnable phalanxes lose formation, therefore overpowering them in their front. There has only ever been one battle that I choose my ground to fight on--that is the Rome sally battle that I will always fight--I land on the river ford just next to Rome, and besiege it. The next turn the combined Senate army comes pouring out (often at numerical disadvantage but qualitative advantage) and hits me. No matter where their field army is, it and the garrison will ALWAYS hit me both on the same side of the river, so I just form a semicircle and have fun. It's always a real slaughter, a real scream. Yeah. that's the only battleground I choose, because it's the only place that I'm guaranteed a battle in any campaign save the Senate campaign.