The 404 BC Battle of Aegospotami — a naval victory for the Spartans under the command of Lysander — was a decisive battle in what war?

The 404 BC Battle of Aegospotami — a naval victory for the Spartans under the command of Lysander — was a decisive battle in what war?

Persian Wars
Peloponnesian War
Corinthian War
Theban War
Lamian War

The Answer: The correct answer is Peloponnesian War.