Equites singulares Augusti
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The equites singulares Augusti (lit: "personal cavalry of the emperor" i.e. imperial horseguards) were the cavalry arm of the Praetorian Guard during the Principate period of imperial Rome. Based in Rome, they escorted the Roman emperor whenever he left the city on a campaign or on tours of the provinces.[1] The equites singulares Augusti were a highly trained unit dedicated to protecting the emperor. Men who served in the equites singulares Augusti held a Roman public status as equites.