More than 200 years ago, Marines made a name for themselves fighting the Barbary pirates at the shores of Tripoli. Could they be returning soon? The question at least needs to be asked, in light of the Pentagon’s acknowledgement today that they are repositioning naval forces off the coast of Libya — including its capital, Tripoli — as the security situation in the north African country continues to crumble. Conceptually, it’s a made-for-Marines special if ground operations are deemed necessary. Marine expeditionary units aboard Navy vessels are typically among the first involved in humanitarian operations, evacuations and other actions needed…