How could Italy form early?

Wikipedia's article on Pope John X mentions... "the defeat and death of Berengar in 924, through the combination of the Italian princes, again frustrated the hopes of a united Italy..."

http://en.wikipedia.org/wiki/Pope_John_X

The source for that is the 1911 Encyclopedia Britannica. So the implication is a more successful Berengar might have done it.

He was getting on in years, though. But how plausible is that POD?
 
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