Its citizens were put through the agoge system at age 7, which was not allowed for the slaves called helots.
A king of this polity helped Isagoras oust Cleisthenes from power, Cleomenes I. Its Great Rhetra established a government of 5 ephors and 2 kings, and was introduced by Lycurgus. Led by Lysander at Aegospotami, it was home to the winning commander at the Battle of Plataea, Pausanias, and was defeated by Epaminondas at Leuctra. Its citizens were put through the agoge system at age 7, which was not allowed for the slaves called helots. Led by Leonidas at the Battle of Thermopylae, for 10 points, name this Greek city-state that gave everyone mandatory military training and defeated Athens in the Peloponnesian War.
A king of this polity helped Isagoras oust Cleisthenes from power, Cleomenes I.
{Sparta} [accept {Lacedaemon} before mentioned; prompt on {Laconia}]