How is the Mountains and Basins Region different from the Great Plains region? The Mountain and Basin Region has wooded land, with plenty of rain, and a long growing season.
The Mountain and Basin region is a flat, treeless plain, with cold winters.
The Mountain and Basin region is a dry, desert area with large mountains and little rain.
The Mountain and Basin Region has rolling plains, low hills and grassy brush.

the answer would be logic.

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