According to jack rakove, some of our beliefs about the constitution are
a. founded on pure fact.
b. best accepted and not questioned.

the spanish  

hope this meaning spain btw

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.

hope this and have a fantastic day!

                                                    -wolfiewolffromsketch