When retreating from a land combat, I know that all attacking land units must move to one adjacent space from which at least one of those units originally came. But what about the attacking air units? We played it that they may move to any friendly space (range permitting) during the Non-Combat Move. Were we correct in this? Or must they move to the same space as all the land units?
You played it correctly.
Also, I take it that partial retreats are still allowed? i.e. all/some attacking air units may retreat from a land cobat after one round, leaving the attacking land units to continue the struggle… Is this correct also? Thank you again.
Partial retreats are only allowed in the case of amphibious assaults. Even then, all units that may retreat (non-amphibious units) must retreat at the same time.