Leonidas I

Leonidas became one of the two kings of Sparta, likely succeeding his half-brother Cleomenes I. As a member of the Agiad dynasty, he assumed command of the Spartan army and played a key role in Spartan foreign policy during the Persian invasion.

Leonidas led a small Greek force, including 300 Spartans, against the invading Persian army under Xerxes I at the pass of Thermopylae. The Greeks held for three days before being outflanked. Leonidas and his contingent were killed, but the stand became a symbol of Greek resistance.

Leonidas commanded the allied Greek forces at Thermopylae. He chose to remain with the rearguard after learning of the Persian flanking maneuver, leading to his death along with his 300 Spartans and other Greek volunteers. The sacrifice delayed the Persian advance.