At the risk of sounding like Bill Clinton, I think what we are running into is a problem with the WiF definition of the word "once" as it is used in Footnote 5:
5 Rolled once per city, major power, neutral minor country or search.
The options:
A) Once = once per game
B) Once = once per attempt/occurance
Option A) seems to support the USSR being able to DOW a minor multiple times with only the
first time resulting in a US Entry roll, but it also does
not seem to support a US Entry roll for Japan taking over Sian (for example) each time it happens.
Option B) seems to support a US Entry roll for
each of the multiple DOWs the USSR could make on a particular minor,
and the Japan situation, too.
I have always thought this was a little ambiguous. Does the "once per" in footnote 5 apply to the target or the country taking the action?
For Example:
20. Axis declares war on:
--Poland, Spain, Turkey or any American country (12)
--Belgium, Finland, Rumania, Sweden or Switzerland (8)
--Other minor (3)
In this case, each of the lower three entries has footnote 5.
Is that there to clarify that it is "once per" minor country in this row?
This would be so that people don't think: okay, I've taken the hit for a DOW on Spain, so now I can DOW Turkey without any repercussions.
Or does it mean "once" per game for each major power making a DOW on any of these minors?
This would clarify that Germany only rolls once per game for a DOW on Spain, but if Spain becomes neutral again and then Italy makes a DOW . . . then Italy
also has to roll for US Entry.
It's entirely possible that I'm missiing something somewhere in here.
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Edit: I think I know how I'd play it with my own "house rules", but I guess my point is that RAW needs some lessons in semantics and clarity.
Always listen to experts. They'll tell you what can't be done and why. Then do it!
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