About attacks

[Waenedhelion]

Please, help me answering these questions:
1- Are combats among entire land/sea zones or can I divide units in a territory to attack different territories?
2- I attack a territory and want to send supporting fighters to the battle from a zone which contains other units in addition to the planes. Can I do this without involve the other units into the battle?
3- I've attacked with units coming from different zones but now I want to withdraw: where do my units go?
4- Does a submarine first-attack prevent a sub to fight again on the same turn? I mean, after having shot a first-attack, can a sub shoot its normal one?
Thank you a lot for your answers.

[RuHurt]

1: Yes, you can order as many pieces from one territory to as many other territories as you want.
2: Yes, you can move fighter or bombers to any other territory without involving any other units.
3: ALL your pieces must retreat together to ONE territory that any attacking piece came from.
4: No, the sub's first strike attack IS its attack, and it uses it every time it gets to fire.

[Pede]

4 - As I read it you will still be able to do normal fire after the "first shot".

A section from the manual on page 26-27:

( Two German submarines are moving from Azores Sea to Central Atlantic attacking an American battleship and an American destroyer)

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Submarine Movement Example

The German player rolls two dice, hoping for a “2” or lower.
The roll is two “2s”– two hits! The U.S. player tips his battleship on its side, showing it has taken one hit. He then selects the destroyer as a casualty, moving it into the Casualties area.
Because of the destroyer present, these hits are not “first shots.” The U.S. player rolls two dice, hoping for a “3” for the destroyer and a “4” for the battleship. The destroyer misses
with a “5,” but the battleship hits with a "4." Germany loses a submarine.

In the second round, the German submarine now gets a first shot because there is no longer a destroyer in the battle. The sub misses with a roll of a “5.” The battleship counterattacks, but misses with a “6.” Not wishing to push his luck, the German player decides to submerge the remaining submarine and tips it on its side.

With the sub submerged, the battle is over. At the end of the German player’s turn, both the submarine and the battleship are uprighted. On the United States’ turn, the combat will resume
in this sea zone unless the American moves the battleship out during the Combat Movement sequence.

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I am sorry if I confuse you but I think my answer is the right.

In the second part of the extract it says Germany gains "first shot" but misses. Not wishing to push his luck the German player decides to submerge.

[Waenedhelion]

In the extract that you have posted the German sub gains a first-attack because the American destroyer is no longer in the battle; then, it does the first-attack but misses and the American battleship returns fire. This is a typical combat situation: a player attacks and his/her enemy counterattacks. What I mean is: if the sub had been able to do a normal attack after a first-strike one, the battleship wouldn't have been able to counterattack immediately, as in the example, but it should have waited for the German sub normal attack. If it has returned fire, it means that the sub has already done its attack, which is a first-strike in this case.
I hope I've been clear as much as possible!