I was nearly forty times the size of the losing army, which suffered the death of its leader, Leonidas.
The defeat and subsequent flight of the Phocians prior to this battle foreshadowed the doom of the losing side, which was betrayed by Ephialtes. Taking place at the location of the so-called "hot gates", the winning army under Xerxes I was nearly forty times the size of the losing army, which suffered the death of its leader, Leonidas. For 10 points, name this 480 BCE battle where the Persian force killed all 300 Spartan defenders of the namesake pass.
The defeat and subsequent flight of the Phocians prior to this battle foreshadowed the doom of the losing side, which was betrayed by Ephialtes.
Battle of {Thermopylae}