Security detail

A security detail more often known as a PSD, standing for Protective Services Detail, Personal Security Detachment, or Personal Security Detail is a protective team assigned to protect the personal security of an individual or group. PSDs can be made up of military personnel, private security contractors, or law enforcement agents.

In the U.S. Marine Corps, an individual's security team is called a Personal Security Detachment and are assigned to Personal Security Company.

PSD teams are often made up of private security personnel. Organizations such as Academi's security department, DynCorp and Triple Canopy, Inc. offer armed security teams to clients traveling in war zones.

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Wikipedia