http://agathe.gr/democracy/the_athenian_army.html
The Athenian Army From the very beginning, the Athenians were compelled to fight for their new democracy. Their dramatic victories over the Boiotians and Chalkidians in 506 B.C. led many to attribute Athenian ... service as ephebes from age 18 ... ephebes give a display of drill ... Herms, the place frequented by