Battle of Leuctra
The earliest surviving record of the Sacred Band by name was in 324 BC, in the oration "Against Demosthenes" by the Athenian logographer Dinarchus. He mentions the Sacred Band as being led by the general Pelopidas and, alongside Epaminondas who commanded the army of Thebes (Boeotia), were responsible for the defeat of the Spartans at the decisive Battle of Leuctra (371 BC).