The Delian League, or you could call it the Athenian Empire, is getting more and more powerful. The Athenian Navy is getting more and more powerful. And once again, things culminate. And now this is the beginning of the actual Peloponnesian War, the thing that people are referring to when they talk about the Peloponnesian War. In 431 BCE, the king of Asparta is convinced, or is, I guess you could say, he is influenced to, even though he himself was somewhat skeptical of the idea, he decides to invade Attica. Attica is something you'll hear a lot about. It is this region right over here, this little out-jutting of land that Athens is on.