Byzantine Emperor Justinian I abandons goal of reconquering Italy?

It appears most historians of the period of the Gothic War would agree that, in retrospect, the invasion and conquest of Italy by the Byzantine empire in the 6th Century was a mistake, a policy decsion that chsed short-term glory at the price of exhausting the empire's resources and loading it with borders that would prove unsustainable in the long run.

What are the more probable results of Justinian shelving the plans for his campaign before they are attempted?
 
It appears most historians of the period of the Gothic War would agree that, in retrospect, the invasion and conquest of Italy by the Byzantine empire in the 6th Century was a mistake, a policy decsion that chsed short-term glory at the price of exhausting the empire's resources and loading it with borders that would prove unsustainable in the long run.

What are the more probable results of Justinian shelving the plans for his campaign before they are attempted?

More than likely persistence in securing Africa - which would serve the Empire reasonably well, creating a stronger Romano-Berber region in the Empire. If we're sticking with the idea of "Slower Expansion", then it would likely mean that if the Empire can retain it's strength to fight Khosrau, it means that a follow-up invasion can enter Italy with more modest goals - i.e. taking control of Italy below Rome, and Gothic Client in the Northern half. This should work quite well, as it means that Belisarius can get back to the capital more regularly and maintain his relationship with Justinian.
 
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