Question:
Does the limit mean total number of Air Units that may be committed for GS per RE or the maximum number that counts?
For example, I am attacking with three REs of ground units (one panzer division). I have committed 8 air units to GS. Per the rules, 3 air units provide GS, the 5 others don’t contribute any SPs. The defender now fires AA and turns back one unit. May the attacker “call in” one of the surplus 5 units instead of the one that was turned back?
Answer:
First of all, combat is not mandatory, so any number of air units could be flown on GS and this would not “force” an attack, in and of itself.
However, once the phasing player initiates combat resolution for a particular hex, then combat resolution must proceed.
Any units that fire AA are automatically included in the attack, since firing AA is, per earlier rulings on this, part of resolving combat. Beyond this, however, there are no requirements that anyone attack. So yes, if you decide to begin the combat resolution for a particular attack, you are free to declare that of the x number of units available to participate, only one will do so, and if so, then GS calculations are governed by what attacks, and not by what is available to attack.
To be quite clear, the number of air units flown on a mission such as DAS and/or GS has nothing to do with how many may participate; one is always able to fly as many air units as desired and possible, the limitations are only in effect once the combat is to be resolved. Even flying the GS mission doesn’t mandate combat, as the rules make plainly clear (last paragraph, 20G.2.b).
Source:
TEM 59/60
Source:
Errata published at http://www.hmsgrd.com/Files/Europa/Second Front/Second Front.pdf