What was significant about the Persian Wars?

Answer 1

Persia was trying to impose peace on the Asia Minor Greek cities. Some Greek cities outside the Empire intervened so the war spread, and what was an attempt to put an end to the endless fighting between Greek cities in the eastern Mediterranean became a war between mixed sides, with many Greeks siding with Persia, and many in opposition. The interim answer after 50 years of war was the Persians gave up and left the Greeks to vicious internal warfare. The

An attempt at forcing Law and Order failed on the self-interest of the Greek city-states. After Persia gave up, Athens cynically turned the anti-Persian coalition into an empire of its own.

Answer 2

It put a limit on the expansion of the Persian Empire in the west.