In Squeezing the Melon, I was rather surprised that Allied units at the bend in the road could see and engage German reinforcement units coming from their set up zone. Not complaining, just kind of amazed - was this an intentional design feature or just a happy accident? It was a very unexpected situation, the other terrain is so dense I had no expectations for long range encounters.
That also came as a shock to me - fortunately not too much damage was done - but I never even thought to check it.