As the Persians unloaded their ships and prepared to fight the Greeks after waiting so long in Marathon, the Athenians ambushed them and won the Battle of Marathon.
The Persian wanted revenge on the Athenians, and invaded Greece with 200,000 troops. To defend themselves, all Greek city state joined forces. Sparta supplied the most soldiers,while Athens controlled naval forces and devised a plan.
In the Battle of Thermopylae, the Spartans, led by King Leonidas, tried to cut off the Persians and stop them from reaching Athens.
Thanks to a traitor working for the Persians, the Persians won the Battle of Thermopylae.
Themistocles of Athens devised a battle plan to attack Persia's navy. They lured the Persians to the strait of Salamis, which was too narrow for Persia's ships, but big enough for Athen's ships. The Athenians sunk 300 Persian ships and won the Battle of Salamis
The Greeks, teamed up, fought at the Battle of Platea with about 100,000 soldiers, which is about as much as the Persian soldiers. The Greeks won the battle, and made peace with the Persians, who weakened shortly after.