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Anaxandridas II was the father of Leonidas I, a renowned Spartan king who famously led the 300 Spartans at the Battle of Thermopylae. Anaxandridas II was a member of the Agiad dynasty, one of the two royal families of Sparta. He reigned from 560 to 520 BC and was known for his military prowess and his role in expanding Spartan territory.