Bah, they will need more marines than that to take my secret Jungle fortress!
The official statement is they are authorized to come in and help combat drugs, as Costa Rica can't handle it themselves (they can't handle much of anything, really). CR has become a major gateway for drugs from Colombia heading northwards.
The actual thought is, they are coming to oust Daniel Ortega (Nicaragua).
China has also just recently become extremely pissed off at Costa Rica...so could be CR simply showing them "we sold out to the USA now so back off".
Lastly, they are obviously here to bolster Costa Rica's fading sex tourism industry
