The Marine Corps is a very tough and flexible force.
But perhaps the most versatile Marine unit is the Marine Corps Security Force Regiment — a dedicated security and counter-terrorism unit that’s used for everything from guarding nukes to rescuing diplomats.
In fact, the more famous counter-terror units like Delta Force, SEAL Team Six, the Special Air Service or GSG 9 are young whippersnappers compared to the Marine Corps Security Force Regiment. Tracing its lineage to the 1920s, the Marine Security Force Regiment was around long before the SAS was a gleam in the eye of David Stirling.
When the Navy’s part of America’s nuclear triad is in port, it’s these Marines that defend it.
The Security Forces Marines get the task for one simple reason: America’s SSBN force may be safe when it’s out at sea, but when in port, it is vulnerable to attack. Not only that, the UGM-133 Trident II ballistic missiles are usually not on the submarines and represent a perfect target for those seeking to cripple the sea-based deterrent.
Part of that effort includes the unit’s Recapture Tactics Teams. According to Military.com, these teams specialize in recovering materials, people, and property tied to the strategic inventory.
AmericanSpecialOps.com notes that they are called the CQB Team, and they are trained to act at the squad level.
According to its official webpage, the Security Force Regiment is also tasked with providing “forward deployed, expeditionary antiterrorism and security forces to support designated commanders and protect vital national assets” and “expeditionary antiterrorism and security forces, deployable from the United States, to establish or augment security as directed by the commander of U.S. Marine Corps Forces Command.”
The units sent in those cases are the Fleet Anti-terrorist Security Teams, and the companies in vulnerable commands are called FAST Companies. Platoons from a FAST company could be sent to bolster an embassy or consulate that has come under attack.
In 2012, those were the Marines called on in the aftermath of the Benghazi attack according to USNI News.
To see what FAST Marines can do, check out this video: