Praetorian Guard

 are the personal bodyguard of Caesar's who use only unarmed combat in battle. They can see through your disguise if you are disguised as part of Caesar's Legion.

Background
Their name refers to the ancient Roman Praetorians, bodyguards of a general's tent (praetorium) and, in later centuries, of the emperors.

Appearances
appears in Fallout: New Vegas.