Greek Empire By mariano454 776 BCE First Olympic Games Period: 497 BCE to 479 BCE Persian Wars 490 BCE Battle of Marathon Athenians defeat Darius and his Persian army 480 BCE Battle of Thermopylae Period: 461 BCE to 445 BCE Peloponnesian Wars 429 BCE Death of Perikles 322 BCE Aristotle Dies 284 BCE Achaean League created