Not at all. The war began when the restive Greek city-states within the Persian Empire revolted.
The Greek city-states of Asia Minor revolted against Persian rule.
He was a prominent leader in Athens, and commanded the Athenian fleet which formed part of the Greek fleet which opposed the Persian invasion.
The Ionan Revolt of Greek city-states within the Persian Empire, which spread through interference by mainland Greek cities in support of the revolt.
A succession of generals from both sides over the 50 year period that the wars lasted.
It did not. The Persian Wars began in 499 BCE when the Greek city-states of Asia Minor revolted against Persian rule. Athens became involved when it sent an expedition to assist those cities.
The Greek cities so weakened themselves that they became an easy target. Their takeover strengthened Macedonia sufficiently for it then to takeover the Persian Empire.
Economic Failures lead to instability and reliance on military regimes in the 1960s.
floods and lost of life
Persian
Because the Persian army wanted to destroy individual Greek poli, so Athens convinced other poli to combine forces with them and make a league or an alliance in order to attack the Persian army and eventually win.
The Battle of Marathon occurred during the Persian attempt to suppress Athens for interferince in supporting the uprising of the Greek cities within the Persian empire a decade earler (Ionian Revolt).The failure by Persia at Marathon led to their trying to absorb all the mainland Greek cities as a final solution to the problem, which brought on the main part of the wars which lasted from 499 to 449 BCE.
The Delian League of a couple of hundred Greek cities was formed under the leadership of Athens half-way through the Persian War to prosecute the defence against Persia - the war went on for another twenty years.