In 490 BCE, a Persian fleet of 600 ships landed on the plain of Marathon, just 26 miles from Athens. The Athenian assembly, led by the polemarch Callimachus and the strategos Miltiades, voted to march out and meet the invaders. Outnumbered nearly two to one, the Greek hoplites charged across a mile of open ground — and won. Lucas and Luna explore the tactical genius of Miltiades, the controversial role of the Plataeans, the mysterious absence of Sparta, and the legend of the runner Pheidippides. They discuss the political stakes: the Alcmaeonid family's suspected sympathy with Persia, the exile of Aristides, and the trial of Miltiades himself a year later. This episode also examines what the battle meant for Athenian democracy — how a citizen army's victory over an imperial power cemented the idea of free men fighting for their own city. And they ask: did Marathon really save Western civilization, or is that just a story we tell ourselves?