Illustration of BATTLE OF PLATAEA The Greeks, led by the Spartan Pausanias, defeat a Persian army twice their size, thereby freeing Greece from the Persian menace, 479 BC

Greek spears all point outward in 479 bc as Spartans, at left, fight alongside Plataeans against Persian invaders. A half century later, however, as Athens and Sparta wrangled for supremacy, Greek allies became foes. (Chronicle (Alamy Stock Photo))

Chronicle (Alamy Stock Photo)