What gave the u. s. government an idea that a cia-backed coup would work against castro? he did not possess a very strong military at the time. castro had no allies from which he could receive aid. officials believed cuban peasants disliked castro. cuban-based american companies were popular there.

so, based on the research i've done. the u.s. government were always on a wild goose chase just to take down castro. he then retired his trone to his brother raul in 2008 due to some health issues. so it's obvious your answer would be:

castro had no allies from which he could receive aid.

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                                                    -wolfiewolffromsketch

small european communities with shared traditions consolidated into large new states (apex)