TG: No, not really. The USSR sorta backed up the new Cuban state when it was already established. All fidel, Che, and Camilo got was about 15 survivors from the Granma, a handful of peasants who signed up right off the bat, and maybe a dozen old, worn-out rifles. All they had to build up on were members of the peasant population and what guns they got from the soldiers they killed. The Soviets didn't lay high odds on them winning, the US was actively trying to get them killed after they proved themselves a serious threat to Batista, and there was not a single government in the region that would be sorry to see them go.