Battle of Thermopylae (279 BC)

Battle of Thermopylae
	Part of Gallic invasion of the Balkans
	; Route of the Gallic invasion of the Balkans
Date	279 BC
Location	Thermopylae
Result	Celtic victory at Thermopylae; Celtic attack at Aetolia repulsed;
Belligerents
Celts	Aetolian League; Boeotians; Athenians; Phocians; Locrians; Megarians; Macedonian and Seleucid mercenaries
Commanders and leaders
Brennos; Akichorios; Orestorios; Kombotis	Kalippos (Athenian contingent); Kephisodotos, Thearidas, Diogenes and Lysandros (Boeotian contingent); Kritobulos and Antiochos (Phokian contingent); Meidias (Locrian contingent); Hipponikos (Megarian contingent); Eurydamos, Polyarchos, Polyphron and Lakrates (Aetolian contingent); Aristomedos (Macedonian mercenaries); Telesarchos (Greek and Syrian mercenaries)

The Battle of Thermopylae was fought in 279 BC between invading Gallic armies and a combined Greek army of Aetolians, Boeotians, Athenians, Phocians and Locrians at Thermopylae. The Gauls under Brennus were victorious, and advanced further into the Greek peninsula where they attempted to sack Delphi but were completely defeated.