ORIGINAL: Gil R.
No, of course not. This refers to tactical battles, and those involve defeating the enemy, not sneaking around them. A brigade that is vulnerable to the enemy will be pounced on by one or two, or perhaps three, other brigades. If the entire ANV is in that battle then the AI will keep the rest of it where it needs to be.
Good to know. Believe it or not, not all AI's (Animated Ignorance) are bright enough to make this distinction..., and in more than a few computer games they can be led around by the nose with just such little tricks. Haqppy to see you fellows have solved that irritating little glitch.