I havent played the scenario yet but....
The Dominican Republic doesnt have galleons... they are a bit far behind but they do have destroyers and hold higgins boats and vietnam era patrol boats.... i mean im not too fond of dominicans (since im puertorican) but i have to help them out a bit.
In Puerto Rico there should be very little units... in the last decade the US has removed almost all military instalations due to protests, we do still have our national guad (or US national guard) but all those units are in Iraq. Not sure how you will treat PR... its all very complicated the US says its a commonwealth or something and everyone else calls it a colony . Puerto Ricans call it a free and assosiated state... but lets not discuss that its too complicated.
Oh and UN peacekeepers should be in the scenario since there are over 7000 of them in Haiti (because the country has been in anarchy for a couple of years).
Oh and you can add Puerto Rican communist units to cause trouble in cuba and PR since there are a few of them here ... they meet with cubans every year and recently have been getting mad because the FBi assinates their leaders. ( not that i care they are not really nice people)
You can also add Haitian rebels ... they are causing all kinds of hell in Haiti and the DR border and fighting with the UN forces.
Ok gonna play this next... then i will really make suggestions.
PS: thanks raul for correcting our friend goldeagle and thanks goldeagle appreaciate the effort ! keep practicing !!
pss: hope i made sense i usually dont this late at night...