tyrspawn said:
There is no guide on overstacking or information on how overstacking effects multiple armies/provinces AFAIk
That link provided should answer it for you.
Here's how I do it:
ATTACKING:
1. WITHIN a corp - the commanding officer must be able to control the number of units.
2. FROM a province - the senior commander must be able to command the TOTAL number of units attacking, irrespective of their disposition within corps.
SO.....
If attacking from a province:
A Lt Gen can command 3 divs in TOTAL. They could have all three in their OWN corp, or 2 in theirs and 1 in another, or 1 in theirs and 2 other single corps, or indeed one in theirs and 2 in another corp commanded by another Lt Gen (i.e. in all these cases, ALL the rules above are obeyed).
If, in the above situation, the 2nd corp of 2 divs was commanded by a Maj Gen, then one of those divs would get stacking penalties because, even though the Lt Gen can command 3 divs, because the commander of the 2 div corp fails rule 1 i.e. can only command 1 div, but has 2.
An HQ DOUBLES the command factor for rule 2 but does NOT cancel rule 1 i.e. the same Lt Gen could command 6 divs attacking, BUT each would need to be within a corp where the commander can command the number of divs in the corp.
IF you ALWAYS obey the first rule, then the only thing to consider is the TOTAL number of divisions attacking. WITH an HQ, a commander can handle DOUBLE the number of divs in the total attack.
Thus, yes, with an HQ, a FM can command an attack using a total of 24 divs.
ALSO important to remember that the HQ effect only works if the HQ ITSELF is commanded by a Gen or FM. Finally, the HQ does NOT need to be INCLUDED as one of the divs in the attack, it merely has to be in, or adjacent to, the province from which the attack is being launched. I always use 'Old Guard' commanders to run HQs as they aren't as good as others for commanding front line troops - they only need the rank to command the HQ to provide the benefit.
DEFENDING:
The ONLY rule that applies is rule 1 i.e. each corp can only have as many divs in it as the individual commander can handle.
Thus it is possible to have 20 divs, divided into 20 corps of one div each, with each commanded by a Maj Gen, defend at full capacity.
In summary:
1. keep each corp to the size able to be commanded by its commanding eneral.
2. If ATTACKING, keep the TOTAL number of divs involved to the number able to be commanded by the senior commander involved in the attack.
3. IF an HQ with a Gen/FM is in the province, or an adjacent province, keep the TOTAL number of divs involved to DOUBLE the number able to be commanded by the senior commander involved in the attack.
Couple of minor points:
- multiple HQ's do NOT stack the command bonus. i.e. 2 HQs do not enable a FM to handle an attack of 48 units!
- 24 is the maximum number of divs able to attack from a province without penalty (a FM with HQ bonus can command a battle of 24 divs from their province)
- there is no limit to the number of units able to attack a province, the limiting factor is the number FROM each prov. Thus a province bordered by 4 other provinces could, if you had a FM in each prov and an HQ in/adjacent to each prov from which attacks are launched, command a battle involving 96 divs i.e. 4 provs x 24 divs.....OUCH!!
I'm sure the guide says the same thing in one way or another, but that's how it works for land divs. Naval and Air are the same, except there aren't naval/air HQs.
Hope this helps. I find those simple rules ensure I never have command and control penalties.
Cheers