I fought one battle as France against Iroquois Indians. Battle AI demonstrated vividness not observed before. I was the attacker but had artillery on my side. After some pounding the AI's troops advanced (as usually happened). However, this time, they also performed some several false retreats + flanking moves and charged their cavalry at very reasonable targets. The battle chance bar showed fair chances for the AI up to the point when my reinforcements joined the thick of the battle.