@panzerjager:
If you remember in AAP1940 Mongolia is a strict neutral and it has 6 differently named territories. I would assume that if I attack Mongolia, then all of Mongolia would be activated against me, so by that logic if Crete is attacked or occupied it would activate Greece too. That’s my opinion. As for colonial empires like Portugal and Mozambique I’m not sure, but probably not.
The Mongolia example is actually an excellent point - and one I had overlooked. That would seem to cut in favor of Greece entering the war by virtue of Crete being occupied/attacked. Because, as you stated, I dont think people would argue moving into just one Mongolian territory would mean the others remain neutral while one part of the country is occupied.
Using the same analogy, it would seem the Greek infantry activation would have to take place in Greece (and not Crete - or a split between the two), as that is the space where there infantry graphic appears.
Afterall, I dont think if you move into Central Mongolia the 2 infantry from Buyant-Uhaa (or any other Mongolian territory) would be allowed to activate in Central Mongolia to oppose the move. Or would they? All best guesses on my part.