How did the Greeks manage to win the Persian wars

The battle of Salamis in Cyprus, in which the Athenians defeated a Persian force and its allies, is considered the end of the wars known as the Greco-Persian Wars. This was followed by a Treaty to be observed by the king of Persia and its generals. The way to reach this supremacy was the Delian League, the association of Greek city-states or Polis in political and military ways which permitted the success over Persia.