I managed to pull off a successful ambush against English Archers with Holy Roman MAA. Archers where sitting near the center of the brush and my scout found them. I was able to bring my MAA right into striking distance and slaughter the unsuspecting foes.
I really like how they implemented the stealth mechanics in this game. Being able to ambush, while also risking getting flanked if you lack vision is great, and really justifies having a scout in/around brush near your army.
Has anyone else had a bushwhack experience in their games?