According to Plutarch, the 300 hand-picked men were chosen by Gorgidas purely for ability and merit, regardless of social class.  It was composed of 150 male couples, each pair consisting of an older erastês (ἐραστής, “lover”) and a younger erômenos (ἐρώμενος, “beloved”).^[19] Athenaeus of Naucratis also records the Sacred Band as being composed of “lovers and their favorites, thus indicating the dignity of the god Eros in that they embrace a glorious death in preference to a dishonorable and reprehensible life”; while Polyaenusdescribes the Sacred Band as being composed of men “devoted to each other by mutual obligations of love”. The origin of the “sacred” appellation of the Sacred Band is unexplained by Dinarchus and other historians. But Plutarch claims that it was due to an exchange of sacred vows between lover and beloved at the shrine of Iolaus (one of the lovers of Hercules) at Thebes. He also tangentially mentions Plato’s characterization of the lover as a “friend inspired of God”. The Sacred Band was stationed in Cadmea as a standing force, likely as defense against future attempts by foreign forces to take the citadel. It was occasionally referred to as the “City Band” (ἐκ πόλεως λόχος), due to their military training and housing being provided at the expense of the Boeotian polis. Their regular training included wrestling and dance. The historian James G. DeVoto points out that Gorgidas previously served as a hipparch(cavalry officer), therefore equestrian training was also likely provided.^[18] The exact ages of the unit’s members are not recorded in ancient testimonies. However, comparing them with the Spartan elite unit Hippeis (ἱππεῖς) and the Athenian epheboi (ἔφηβοι) recruits, DeVoto estimates that trainees were inducted as full members to the Sacred Band at the ages of 20 to 21, whereupon they were given a full set of armor by their erastai. They likely ended their service at age 30.