WORLD CIVILIZATION

Detailed explanation-1: -Persian Wars, or Greco-Persian Wars, (492–449 bc) Series of wars between Greek states and Persia, particularly two invasions of Greece by Persia (490, 480–479).

Detailed explanation-2: -On his invasion of Greece in the spring of 480BCE, he reportedly commanded a horde of over two million men. Even the Greek oracle at Delphi encouraged prudence in face of such an overwhelming force (7.140). Thus the question arises of why such an army failed to compel Greece into submission.