http://agathe.gr/democracy/military_service.html
Military Service After the 18-year-old was registered in his deme as a citizen and was approved by the Council, he entered military service as a young conscript (ephebe) with other members of his tribe ... (top) Circular terracotta tokens of Pheidon of the deme of Thriasia, Athenian cavalry commander (hipparch) at Lemnos, fourth century B.C.; (bottom) rectangular terracotta tokens of Xenokles of the deme of Perithoidai, commander of the border patrol (peripolarch), fourth century B.C.