The rules state that Fighters have “air superiority: fighters hit other air units at a 4 or less. on a 2 or less, any casualty can be taken.”
I am confused about exactly what this means. My two guesses are:

-A: fighters can ONLY kill other aircraft. On a 4 or 3, the enemy chooses which aircraft to lose. On a 1 or 2, the owner of that fighter can choose the type of enemy aircraft which was lost.

-B: On a 3 or 4, a fighter scores a hit which must be taken from aircraft (chosen by the loser).
On a 1 or 2, the fighter scores a hit which can be any unit (even a ground unit). This unit is chosen by the owner of the fighter.

Similarly. the rules state that Tac Bombers have “land/sea attack: tac bombers hit ground/sea units at 4 or less. On a 2 or less any casualty can be chosen”
I am confused about exactly what this means. My two guesses are:

-A: Tac can ONLY kill ground/naval units. On a 4 or 3, the enemy chooses which ground/naval unit to lose. On a 1 or 2, the owner of that Tac can choose the type of enemy ground/naval which was lost.

-B: On a 3 or 4, a Tac scores a hit which must be taken from ground/naval (chosen by the loser).
On a 1 or 2, the Tac scores a hit which can be any unit (even an air unit). This unit is chosen by the owner of the Tac.

Can you clear this up?

Can ground units hit air units in a land battle?
For instance, if the Germans send a number of fighters only to a territory with Allied aircraft and ground units, would the Allied ground units be able to hit the german aircraft or would the fight be solely air vs air?

The neutrals set-up page does not list Denmark.
Does Denmark have any forces?

Is the stacking limit also 20 in a major capital for the power attacking the major capital?

For purposes of strategic warfare, it seems that fighters can move to a territory being attacked by BBs on order to intercept the BBs during the stragic raid.
This seems to be another instance where having the initiative is a disadvantage.
Player B could just wait to see what player A has done with his fighters and then take the opportunity to bomb undefended factories and NRZs.

This brings a question about the amount of damage done by bombing raids.
I believe the rules state that any hit by a BB completely destroys the production capacity of the territory. If this is correct, this is a devestating attack.!!!
One successful attack on Munich or Manchester will destroy about 1/4th of Germany’s or Britain’s production. And, BBs have a 2/3 chance of success if they get past the interceptors.
Am I correct, and if so, how is this working out in play-testing?

In my copy of the rules, I do not seem to have setups for Spain, Sweden or Turkey.
This must be an error.
Is there a rule preventing them from being attacked?

The aircraft stacking limit on a plain factory site is 10 (ie one aircraft). This is increased to 20 for a major capital and another 10 to 30 for a major capital with an airbase.

The effective stacking limit for a carrier is 20 (two planes). Does this make sense?

According to the rules, the only way for ships to change port or air units to change base is to be moved during the RP phase. It seems to me that most nations will be using the lion’s share of thei RPs on their navies. This will leave few if any RPs for ground or air redeployment. I realize that ground units can move during “movement” but the maximum RP points of ten that any nation can have, just does not seem to be enough.
How is this working out in your play testing?

In the rules, fighters hit on a 4 or less.
Why, during strategic warfare, do defending fighters hit on a 3 or less?
This seems to punish fighters on the defense which is counterintuitive.

It would seem more appropriate if the defending fighter scored a hit on a 3 or 4 which would result in the attacking bombers and any escorting fighters to take losses at the owning players discression. The player would almost always choose to loose the fighters leaving the bombers to continue the bombing raid.
However on a 1 or 2, the defending fighter should be able to choose a bobmer or an escorting fighter as a hit. This seems more in line with the rules for regular combat.

How is initiative determined for the first turn, before any battles have been fought?
If sea battles have no effect on determining initiative, how can initiative ever change in the Baltic front which has no land spaces?