The Battle of Cyzicus took place in May or June 410 BC during the Peloponnesian War. During the battle, an Athenian fleet commanded by Alcibiades, Thrasybulus, and Theramenes routed and destroyed a Spartan fleet commanded by Mindarus. The victory allowed Athens to recover control over a number of cities in the Hellespont over the next year. In the wake of their defeat, the Spartans made a peace offer, which the Athenians rejected.