Sparta (also known as Lacedaemon) was a prominent Greek city-state in the southern Peloponnese region of Laconia, famed throughout history for its unmatched martial discipline and invincible hoplite phalanx.
According to legend, the royal houses of Sparta traced their ancestry directly to the mythical demigod Heracles (the Heracleidae), claiming the Peloponnese by divine right. The legendary lawgiver Lycurgus established an austere, militarized societal structure guided by the Oracle of Delphi. From the age of seven, Spartan boys entered the rigorous state-run education system known as the Agoge, enduring harsh conditions to become elite warriors. When asked why Sparta lacked stone walls, the Spartans famously answered: "A city is well fortified which has a wall of men instead of bricks."
In 480 BC during the Persian invasion, King Leonidas I and his 300 royal bodyguards made their immortal last stand at the Battle of Thermopylae, stalling the massive Persian host. As the undisputed hegemon of the Peloponnesian League, Sparta led the coalition that defeated Athens in the protracted Peloponnesian War (431–404 BC), temporarily establishing Spartan dominance over all Greece.