Evocatus (plural Evocati) was the Latin term for a soldier in the Roman army who had served out his time and obtained a discharge (missio) but had voluntarily enlisted again at the invitation of the consul or other commander. The name evocati was also applied to a select body of young men of the equestrian order who were appointed by Emperor Domitian to guard his bedchamber. This body is supposed by some writers to have existed under succeeding emperors and to have been the same as that consisting of those known as Evocati Augusti.