WI: King Alexander II of Yugoslavia is not assassinated

What it says on the tin. What happens? Does the slow process of re-democratization continue? Do the reforms enacted under Milan Stojadinovic still happen? Does Yugoslavia align with the Axis reluctantly? If they do, I could see them turning on the Germans as soon as they get a decent chance, perhaps when the German military is already committed against the Russians in the East. What does Yugoslavia look like post-war?
 
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