First, a question. Has anyone figured a way to detect ambushes using a spy? (It seems, spy networks do nothing for that purpose).
If the answer to that question is no the ambushing mechanism seems a tad too powerful as implemented in NTW. That's directly the opposite of what it was in ETW where it simply did not work.
In NTW, playing against France controlled by a human player, I was able to walk my Russian armies from Austria through Italy into the heart of France unopposed and undetected. I achieved that by ending each turn in an ambush position in the woods. I have no qualms about a unit or two of light cavalry being able to do this, but whole armies!?
At least, if hiding a whole army (in contrast to hiding some units that have the "paths seldom trod" ability) is done in an enemy's territory, there should be some pillaging/foraging indications signaling presence of a huge group of men camping out somewhere in forests (as it was the case in RTW and MTW2). That, or spies, setting up a counter-spying network in their own territory, should be able to detect armies sitting in ambush positions.
[UPDATE]
We just played a campaign with a friend with "follow AI moves ON". As far as human opponent's moves are concerned: nada! (nothing). The camera would not budge if the human opponent would make a move.
So, unless the human player is always concentrating right on the section of the map where the opponent is moving his troops, un-noticed ambushes all the way to the heartland of the opponent's lands are possible.




