How is the Battle Planner placing divisions ?

[Ruck]

For my next playthrough Im planning to build some specialized divisions like anti tank, mountaineers and heavy tanks and such, which I normally never build (I play SP only), just for the reason that it makes productions so much easier and I never felt the need for specialized troops in the grand scheme of big frontline wars. So I normally have only one infantry division type and one tank (either light tank only or middle tanks only).

So Im wondering how does the Battle Planner actually places theses troops ?
Will it prioritize tanks to flat land and infantry into woods/cities, mountaineers on hills ?
What if I have enough intel to see that the enemy has tanks in some provinces, will the battle planner reshuffle tanks or anti tanks to neighbouring provinces ?
Will the battle planner try to avoid attacking into cities/woods/hills with my tanks ?

Or is it just random without any logic behind it ?

 

[BeauNiddle]

Last I heard it was one division per neighbouring enemy province. Or at least that is what it aims for as a minimum.

And no it doesn't take division composition into account - if you want to use specialist units either micro them or plan small precise battle plans for them.

 

[General WVPM]

From what I've seen, it just evenly disperses the units by default. Forts, ports and victory points are given priority and are likely to contain more units. There is no priority for an attack order. The battle planner does not create a reserve (unless the supply is too bad).

The defines contain many parameters to tune it to your liking. I've yet to see a mod make it work well though.

 

[bitmode]

So Im wondering how does the Battle Planner actually places theses troops ?
Will it prioritize tanks to flat land and infantry into woods/cities, mountaineers on hills ?
What if I have enough intel to see that the enemy has tanks in some provinces, will the battle planner reshuffle tanks or anti tanks to neighbouring provinces ?
Will the battle planner try to avoid attacking into cities/woods/hills with my tanks ?

Or is it just random without any logic behind it ?

It takes none of these things into account. I'm still busy writing a magnum opus about the battle planer on the side. But as a rule, if you have to question whether it does something, it almost certainly does not.

 

[Eh up me duck]

The battle planner ignores division type in placement. Specialist divisions will need their own armies.

 

[andersonm]

I think the front line logic is a little something like this

 

[Orbs]

I've noticed the BP is slightly flexible in allocation. I was guarding the southern desert in Egypt and didn't like how the BP had the highest division count in a mountain province whilst a desert province that had 3 enemy tiles adjacent to it had far less. So I manually clicked 2 divisions in the mountain province and told them to move to the desert tile and the BP let it happen. Then I moved a 3rd out of curiosity and the BP moved another division from a different tile back to the mountain so I guess I reached it's threshold for shenanigans. None of these units I moved were unassigned from the BP.

So my point is if you have a mountaineer that is not in a mountain tile using the BP, you can manually move that mountaineer and depending on how many units you have the BP will either do nothing, or move another unit out of that mountain (like normal inf) so your mountaineer can stay.

 

[Simon_9732495]

I think the front line logic is a little something like this

Pae and Sarah

 

[Emren]

The battleplanner seems to take the number of neighboring provinces on the opposite side of the front line into account, so it sort of tries to consider potential combat width. I think it also places divisions with a view to opposing forces, but that is really just a hunch...

 

[bitmode]

The battleplanner seems to take the number of neighboring provinces on the opposite side of the front line into account, so it sort of tries to consider potential combat width.

You can look at the produces scores in-game:

• create a front line and select the army
• tdebug
• track_unit_controller_weights
• debug_unit_controller_weights

It should look like this:

In this case the province west of Cologne has a weight of 6.4:

• 1 base
• +1.4 from neighboring non-allied province; 0.7 (PLAN_NEIGHBORING_ENEMY_PROVINCE_FACTOR) each
• +2 from not having a victory point (PLAN_PROVINCE_BASE_IMPORTANCE)
• +2 from being in the home area (hard-coded)

You can mess around with this a bit, but above list already covers almost everything being taken into account.
The weights determine how divisions are distributed. But on fronts with fewer than 4 divisions average per province, up to 20% of divisions are distributed uniformly (see PLAN_PROVINCE_PRIO_DISTRIBUTION_MIN and following defines).