AHC: More Succesful Balkans for Allies

This is a pretty simple AHC: Is there any way to make the Greek and Yugoslav invasions more successful for the Allies? Saving Crete isn't too difficult, considering that Student's plan barely came through when the 5th Mountain division was airlifted into the one airfield held by the Germans.

The real question is, how can the war on the mainland be better for the Greeks and Yugoslavs, especially for the Yugoslavs? I can think that a full mobilization would help, or for the government to accept the military's advice and try to hold the southern part of the country, but I'd like to hear your thoughts.

How, with a POD after 1935, can the Allies perform better in the Balkans?
 
Yugoslavia's pretty much the worst country to defend possible at this point, full of internal strife with numerous ethnic minorities and surrounded by powerful enemies on all sides. Things could have been better of course but I don't see how anything could have greatly improved.

If the Greeks hadn't decided to cross over the mountains and into Albania they could have built up a strong defensive line on the mountains and done a similar thing to the Germans that they did to the Italians,
 

Anaxagoras

Banned
The Greeks, IIRC, had all their troops facing Bulgaria deployed right up to the frontier, although the British advised them to concentrate them farther back on more defensible terrain. Doing so might have bought them some time.
 
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