To nullify the Spartan advantage in numbers and its determination to prompt battle repeatedly, Athens had to rely on superior seamanship and command in every major battle, without any margin of error. It could not fight on the defensive, since it was trying to maintain an empire, which involved more than just keeping out the Spartan fleet. And an unforeseen result of the Athenian victory at Cyzicus was a reexamination of the Spartan command, leading to the appointment of a new admiral, Lysander, who, even more so than Brasidas, would prove to be the unqualified military genius of the entire
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