The Persian Wars, (492–449 B.C.E.), was a series of wars fought by Greek states and Persia. The fighting was most intense during two invasions that Persia launched against mainland Greece between 490 and 479. The Persian empire was at the peak of its strength, the collective defense mounted by the Greeks overcame seemingly impossible odds and even succeeded in liberating Greek city-states on the fringe of Persia itself. The Greek triumph ensured the survival of Greek culture and political structures long after the demise of the Persian empire.
Persian War Map:
First Persian War ( 492 B.C.E to 490 B.C.E):
Darius I, King of Persia, decided he wanted to conquer the Greeks. He gathered a vast army of soldiers that outnumbered any army the Greeks could muster. They boarded the Persian ship fleet and headed to Greece. Landing in on the Greek Plain of Marathon the Greeks and Persians engaged in their first battle.
Read more on the Battle:
Second Persian War (480 B.C.E to 479 B.C.E):
Ten years later, in 480 BC, the son of Darius I, King Xerxes, decided to get his revenge on the Greeks. He amassed a huge army of over 200,000 soldiers and 1,000 warships.