What gets me is why there is no Marine task force in the Med. But then again the muzsymp Obama probably has the Marines doing social work somewhere else.
Having said that, the Fleet Anti-terrorism Security Team (FAST) Marines are specifically trained to secure embassies and the 50 man number is a basic unit for this type of mission. It would not surprise me that the FAST is flying in on MEU helicopter's and the MEU remain off the coast as reinforcement/support.
You've apparently forgotten about the 24th MEU.