They spent 50 years of their time repelling the Persians.
A coalition of Greek city-states fought the invading Persian army and its Greek allies outside the Greek city of Plataea in 479 BCE. The defending Greek army of armoured foot soldiers kept to the rough ground to negate the Persian cavalry, then engaged and defeated the unarmoured Persian infantry. At the same time a Greek fleet swooped on the remnants of the Persian fleet at Mycale and captured it. This combined action ended the invasion of mainland Greece by the Persian king Xerxes.
Against the Persian invasion.
The Greek city-states were already fully developed by the time of those wars.
The Greek city-states were already fully developed by the time of those wars.
Persia was ruled first by king Darius then King Xerxes. The Greek city-states were ruled by their aristocracies.
There was no Greek empire. The Greek world from Spain to Asia Minor comprised hundreds of independent city-state, some of which from time to time formed varying shifting alliances or leagues.
Depends upon the time that they occurred. Ancient Persian Wars were significant during their times for the people that lived in those regions (like anywhere else). Therefore, which Persian War is in question?
There were a couple of hundred Greek city-states in Asia Minor and the islands. These, along with Phoenicia and Egypt, provided most of the Persian navy. In Alexander's time they provided mercenary heavy armoured infantry to help match that of the Macedonian and Greek invaders.
Xerxes was a Persian emperor. Persia is modern-day Iran. He plays a role in Greek mythology because he was a leader at a time when the Persian empire was very strong. As a result, he would be subject to being in many myths about war, etc.
Sparta had the most intense and powerful army in the time of the Persian Empire.
The Greeks formed and executed a superior strategy - to eliminate the Persian naval threat to their cities and then send out their armies, which had been held back to protect their cities, to unite and drive back the Persian land force. They defeated the Persian navy at Salamis, and as the Persians had no fleet to protect their resupply ships, they had to send half their army home for the winter. In the spring, the Greek cities sent out their armies which combined to defeat the half-strength Persian army and its Greek allies at Plataea. At the same time the Greek fleet finished off the Persian fleet rump holed up at Mycale.
Western history would have moved on regardless of the Persian War. Had the Persians won the war, the elasticity of the Greek world would have thrown it off. Alexander the Great, inheritor of a Macedonia which was a vassal of Persia at the time of the Persian War, demonstrated this when he conquered the Persian Empire.