Hymirl, I do understand the point you are trying to put across. your logic goes something like this:-
1) Being in the enemy ZoC reduces the potential activation choices (under 1.7.3 3rd para), so the formation declares a charge
2) Because the unit is already in the ZoC it can move anywhere it likes (under 1.12.3 2nd para), so it can choose to move out of the ZoC and use its FF.
3) However another unit that actually enters the ZoC is compelled to attempt to get into B-B (under 1.7.3 2nd para).
However I think you have missed several quite important aspects in this argument
Firstly the rules are not written by a technical author; there are a number of glaring inconsistencies in them and I have tried (apparently unsuccessfully) to make you aware of this. eg 1.12.3 2nd para says you can go anywhere, while later the 4th para and 1.7.3 both spell out a situation where that is not true. ÂÂ
More importantly your contention goes against the spirit of the rules as laid out in 1.7.3. 2nd para
Quote:
Units may not enter an enemy zone of control while they move, unless they are undertaking an engage action and use their charge move to get into base contact with the nearest enemy unit whose zone of control they have entered.
So, the
only time a unit may enter an enemy unit's ZoC, even in a charge move, is
to get into B-B with that enemy unit (1.12.3 4th para says the same thing:  "A charging unit that enters a zone of control
must move into base contact with the nearest enemy whose zone of control has been entered")
You will no doubt reply that while it has declared an engage activation, the unit is using its charge move to move directly away, but the rule says "and
use their charge move to get into base contact". This is why the unit is compelled to use its charge move to go directly towards the enemy to get into B-B, and in that sense I see no difference between the unit that has voluntarily entered the enemy ZoC and the one that finds itself already in the ZoC.
We all agree that a charging unit may elect to stop short of the ZoC and firefight, so it is not compelled to move into B-B (unless it gets into that ZoC). Equally a unit is not compelled to move, unless it finds itself in an enemy ZoC as SG says. ÂÂ
However, as several of us have tried to point out, this is really making a mountain out of a molehill because the player has a number of ways of resolving the situation before getting to this point. What is it that you are having such difficulty with?