The Persian Wars may be famed in history, but few artifacts and material remains have emerged to shed light on how the ancient Greeks defeated the Asian invaders and saved Europe in what scholars call one of the first great victories of freedom over tyranny. It is well known that a deadly warship of antiquity, the trireme, a fast galley powered by three banks of rowers pulling up to 200 oars, played a crucial role in the fierce battles. Its bronze ram could smash enemy ships, and armed soldiers could leap aboard a foe's vessel in hand-to-hand combat with...