The main scenario I would like to discuss is the Axis invasion of Greece that, IOTL, led to the occupation of mainland Greece by April of 1941. Suppose that, somehow, some part of mainland Greece is free of Axis forces in early 1942--either the Germans don't intervene and the Italo-Greek war degenerates into a stalemate, or there is no Italo-Greek War at all. Or the Greeks perform much better than IOTL and hold the Germans at the Peloponnese.
Could Greece become a starting point for Anglo-American land operations in the European continent in 1942? If Greece is holding out in some form, how many troops can the Allies put in to start driving the Axis forces back? And how would such a Balkan campaign look?
The main reason for this question is that, until 1943 (when the Allies made Unconditional Surrender their official war aim) there were Hungarian and Romanian politicians open to changing sides, and I am curious as to whether they could actually manage it if Allied forces could grind their way through Greece and into Bulgaria and Yugoslavia by the end of 1942.
If there is no Italo-Greek War at all, and Greece remains neutral, would the country instead be a Spain-like neutral power, or might the Allies somehow turn it to their side and use it as a springboard that way?