Improving the AI's awareness of 'indian country'.
I set an attack down a track, and hit the enemy from his flank. The attack goes well, but supplies run short.
The initial route is secure, and the supplies could easily reach the attacking formation by following the tracks of the tanks... but instead they drive down the main road, through the town (objective) and get slaughtered...
Worse... the attack on the town is planned, all the formations are arranged around it. Artillery to the rear etc. Each major formation is given 'its bite' of the perimeter to grab... and the HQ/artillery/supply gets routed by the AI through the city to 'hit it from the flank...'. Arrgh.... that isn't a valid route - the whole 'bit I don't occupy' is crawling with enemies... especially the bits near all the objectives...
When planning, I personally reckon on 7 main zones...
What I definitely own.
What he definitely/probably owns - intel reports/instinct about old reports/strongpoints & objectives.
What I think I control - behind my FLOT, except where I think we are intermixed, or he can observe/fire.
What I think he controls - behind his FLOT, plus pocketed troops/bypassed uncleared woods/towns etc.
Bits I control, but he prevents me using (by fire, observation etc).
Bits I assume he controls, but I can fire into, or clearly observe - I can't see everything, but can detect firing or large movements, sufficient to bring at least IDF assets to bear.
No-mans-land. Not under either player's control (AFAICT - at least not mine..) in practice treated like 'his control' but more likely to contain unpleasant surprises - mostly because the frequency of 'normal contacts' is lower, and everyone is busier elsewhere or not paying proper attention. (Really I should know better - I really like finding his floating flank(s), but get carried away and seem to forget mine )
The 'what I think I control' includes all the other portions I assume are under my control, both those I know are 'clear' (ie under unit footprints and not contested, plus areas swept by unit footprints, and continuously observed since...), and those also areas 'cleared' by moving through/near them without contact, or unobserved for some period since, usually night/poor weather, or by moving combat formations away - plus those areas putatively on my side of the FLOT near the scenario start. After a few days, this is reassessed according to situation - I might fear a turned flank, infiltration or breakthrough, and downgrade my own rear areas to 'unknown', except where obviously still 'clear'.
By contrast, the AI seems to permanently assume the enemy only occupies those areas where current/recent contacts are shown, and the entire 'rest of the map' is free. A little more paranoia wouldn't go amiss, this is supposed to be a war.