How could France get Milan during the Italian Wars?

Without removing Charles V and his Imperial and Spanish territories, how could the French succeed during the Italian Wars and get a peace that grants them Milan?
 
Maybe a French victory early in the Italian war? Going by wikipedia, early on (On 22 October 1521, to be precise) Francis encountered the Imperial army, but despite the urgings of Charles de Bourbon did not attack. The French posistion would (going by wikipedia, again) deteriorate considerably later on, making this arguably a good POD.
 
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