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Would it have been possible for there to have been one between the two? If Cuba still went communist like they did in OTL, what circumstances would have to change for there to be a breakdown in relations between them?

It did happen with China and Yugoslavia, though the circumstances between those two are obviously quite different.

Would there have been a Soviet military intervention? Would the Americans have gotten involved? And what about Cuba? Would they have stayed communist but neutral, possibly joined the Non-Aligned Movement, or would another revolution take place?
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