Sure it can. All it takes is a Vichy French unit sitting in one or more of her colonies, or the first attack (without ground striking or ground supporting) made by units outside of Metropolitan Vichy France on Vichy unit(s) inside of Metropolitan Vichy France. As long as Vichy isn't hostile to the attacker of course, and as long as no other allied units have entered Metropolitan Vichy France previously.
You raise a good question about the Vichy Territorials defecting. As worded in RAW currrently, they don't roll for it, but I will take a question as to design intent back to the RAW8 rules group.
As for the Yahoo group, I don't post questions about rules I'm sure of. Rules there (or anywhere else) are not decided by majority vote. When debate is intense and there are two (or more ) valid positions (doesn't apply here IMO) someone will ask Harry and he'll rule on it. That's how the FAQ got created, essentially.
I checked the FAQ and at this time there is nothing helpful.
If you review 17.5 Combat with Vichy you will note that its whenever Vichy French land units are involved in a land combat, or are overrun. The only condition is if Vichy France becomes hostile.
How to make Vichy France Hostile
1) The same player moves any French controlled units in hexes controlled by an Allied major power. French controlled naval units rebase at double their range, and French controlled land and air units are moved to the nearest Vichy France or Free-French hex. Alternatively, an Allied major power can destroy every French controlled unit in its territory. If it does so, Vichy France is hostile to that major power (see 17.5).
2) Allied major powers at war with the installing major power may declare war on Vichy France. The declaration of war does not make Vichy France hostile to that Allied major power. However, if an Allied unit enters Metropolitan Vichy France, Vichy France becomes hostile to that unit’s controlling major power.
< Message edited by Extraneous -- 4/6/2013 11:08:44 PM >
University of Science Music and Culture (USMC) class of 71 and 72 ~ Extraneous (AKA Mziln)