You know, these Persians did this injustice to us, now let's go on the offensive. And they form what is called the Delian League. Now once again, Sparta is not so happy about this because more and more it becomes clear that this Delian League, Athens isn't just a participant in the Delian League, Athens is starting to run the Delian League. And when people try to drop out of the Delian League over time, Athens starts to exert itself. So the Delian League is really starting more and more and more into an Athenian empire. So once again, Athens proved itself, its navy proved itself to be very powerful in this war. Sparta's getting insecure.