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 ... For those who did not come back from war but died in battle the People raised monuments, often simple lists of names, listed by tribes in their official order (12), but sometimes with a poetic tribute to the fallen.