The following link might be of help:
https://www.axisandallies.org/forums/index.php?topic=30776.0
:mrgreen:
This has to have come up in games before, but, if a sub is submerged on in the same zone as a crusier, on my turn I move a destroyer into the zone to kill the sub, is my crusier obligated to fight also? I know the rules say ships can move over subs, but, combat moves come before noncombat and my understanding was also that all units in a zone must participate in combat.
If it were a hostile SZ, you would be free to move the cruiser before combat started. I think it would be kind of weird if a sub forced you to stay and conduct combat rather than move out before combat or do a non-combat move.
That’s what it’s looking like to me, the sub would negate the possiblilty of a non combat movement, but, not a combat movement.
The cruiser must either fight or leave the sea zone in combat movement. If you were not attacking the sub, the cruiser could choose to leave in noncombat movement.
As I suspected….damn. Thank you sir.