After the Cuban Missile Crisis- after Oct 1962? So, I guess that we just miss the opportunity to use Rafael Leónidas Trujillo Molina evading his OTL assassination (in May 1961) as the POD. Still, I'd say that the Dominican Republic seems to be by far the best choice as an adversary. Perhaps if Cuba decides to intervene when the Dominican Republic's first freely elected president, Juan Bosch, gets overthrown on September 25, 1963 in a military coup? The embarrassment of Trujillo's brutal dictatorship (with the CIA having supported his assassination) was still relatively recent, and the USA probably wouldn't have been willing to resort to direct military intervention at this stage (as they later did in OTL's Operation Power Pack, after the Dominican Civil War). And they'd have the support of the Dominican Republic's legitimate Government- effectively, free passage to deploy their military (peacekeeping) forces on the island, instead of having to fight their way through...