Athens led 180 eastern Greek city-states against the Persians in the last 30 years of the 50-year Persian War.
The league of Greek city-states, often referred to as the Delian League, was an alliance formed in 478 BCE after the Persian Wars. It was led by Athens and aimed to provide mutual defense against Persian aggression and to liberate Greek cities under Persian control. Member states contributed ships or money to a common treasury on the island of Delos. Over time, the league evolved into an Athenian empire, leading to tensions and conflicts with other city-states, particularly Sparta.
They lost one of their two kings and his bodyguard. They kept their army home defending their city. They agreed to continue the Greek strategy of trying to defeat the Persian fleet so that the southern Greek cities would not have to remain at home defending thier cities against threatened Persian amphibious attack, and could concentrate against the persian army, which they did the following year. As the sea battle at Artemesion which was precipitated by the holding of the pass at Thermopylai failed, there was little result from Thermopylai other than good propaganda after the war.
For the Greeks, the Persian War was warding off Persian dominance. The Peloponnesian War was a protracted fight to terminate the Athenian Empire's attempt to dominate the other Greek city-states.
The Athenian and Plataean armies defeat of the Persian expeditionary force convinced other Greek city-states that they could hold off Persian attempts to dominate them.
The Greek city-states in Asia Minor revolted against Persian rule in 499 BCE.
Each other. Athens and Sparta, with their respective Greek allies, fought each other. The Persian Empire later sided with Sparta against Athens, but mostly it was Greek against Greek.
No, it pitted the Persian Empire against varying coalitions of about 200 Greek city-states intermittently over 50 years.
The Persian Empire versus 180 Greek city-states which banded together, led at first by Sparta and then by Athens. The Persian Wars began with a revolt by the Greek city-states in Asia Minor against Persian rule. When the Greek city-states in mainland Greece intervened, Persia attempted to bring them under control too. This went on for 50 years 499 to 449 BCE, until the Persians gave up attempting to impose peace on the Greek cities and left them to return to their incessant wars against each other.
The Greek city-states of Asia Minor were released from Persian rule, and with the Persian threat repelled, the Greek city-states were free to go back to their endless fighting each other. Athens intensified this by turning the Delian League, which it had led against the Persians, into an empire of its own and using the strength to try to dominate the Greek world, leading to the destructive 27-year Peloponnesian War against the League led by Sparta.
To gain land for farming
If you mean Sparta and Athens, they were not rivals but supported each other. The rivalry came after the Persian invasion was repelled and Athens turned the Delian League it had led against the Persian Empire into an empire of its own and used its resources to try to dominate the Greek world.
The Persian Empire on one side, and the southern Greek city-states on the other.
The Greek city-states in Asia Minor under Persian rule were each ruled by a local Greek tyrant appointed by the Persian governor. The tyrant of Miletus, Aristagoras conned the Persian governor Artaphernes to be part of a raid to loot the Greek island of Naxos, which failed. Realising the Governor's retribution was coming, Aristagoras conned the other city states to revolt against Persian rule, beginning the Ionian Revolt which later spread to include the mainland city states in a fifty-year war.
Athens turned the Delian League which it had led against the Persian Empire into an empire of its own, and used this power to try to oppress the other Greek city-states, leading to the devastating 27-year Peloponnesian War which it lost and was stripped of its empire.
They would have had to continue their struggle against Persian rule instead of going back to increasingly vicious and costly wars with each other. And Macedonia would not have been free form Persian rule to dominate the weakened Greek city-states.
If you mean in the Persian Wars against the Greek city-states, it was because the cities temporarily postponed their own wars between each other and combined their forces against the Persian army and naval forces. These forces prevailed at sea because they developed superior naval tactics.The Greek land forces prevailed because their soldiers were armoured infantry (the Persian infantry were unarmoured) and the Greek forces engaged the Persians on rough ground where the superior Persian cavalry could not operate effectively. If you mean Alexander the Great's invasion, Alexander raised a competitive cavalry force to the Persian one, and used this in combination with his superior armoured infantry to better effect.