The Battle of Thermopylae, between Sparta and Persia.
A small handful of Grecian city-states have come together to stand off against the invading Persians at Thermopylae. At this fateful mountain pass, Greece will discover its identity as a nation.
Why does everyone know the Greek defeat at Thermopylae, but victories like Salamis and Plataea remain obscure? Because it helped define Greek, and thus “western” culture. And that’s thanks to one man: Herodotus.