the execution of six of Athens's top naval commanders. Athens's naval supremacy would now be challenged without several of its most able military leaders and a demoralized navy. Unlike some of his predecessors, the new Spartan general, Lysander, was not a member of the Spartan royal families and was also formidable in naval strategy; he was an artful diplomat, who had even cultivated good personal relationships with the Achaemenid prince Cyrus the Younger, son of Emperor Darius II. Seizing its opportunity, the Spartan fleet sailed at once to the Dardanelles, the source of Athens's grain. Threatened with starvation, the Athenian fleet had no choice but to follow. Through cunning strategy, Lysander totally defeated the Athenian fleet, in 405 BC, at the Battle of Aegospotami, destroying 168 ships. Only 12 Athenian ships escaped, and several of these sailed to Cyprus, carrying the strategos (general) Conon, who was anxious not to face the judgment of the Assembly. Facing starvation and disease from the prolonged siege, Athens surrendered in 404 BC, and its allies soon surrendered as well. The democrats at Samos, loyal to the bitter last, held on slightly longer, and were allowed to flee with their lives. The surrender stripped Athens of its walls, its fleet, and all of its overseas possessions. Corinth and Thebes demanded that Athens should be destroyed and all its citizens should be enslaved. However, the Spartans announced their refusal to destroy a city that had done a good service at a time of greatest danger to Greece, and took Athens into their own system. Athens was "to have the same friends and enemies" as Sparta. Aftermath The overall effect of the war in Greece proper was to replace the Athenian Empire with a Spartan empire. After the battle of Aegospotami, Sparta took over the Athenian empire and kept all its tribute revenues for itself; Sparta's allies, who had made greater sacrifices in the war than had Sparta, got nothing. For a short time, Athens was ruled by the Thirty Tyrants, a reactionary regime set up by Sparta. In 403 BC, the oligarchs were overthrown and a democracy was restored by Thrasybulus. Although the hegemony of Athens was broken, the Attic city completed the recovery of its autonomy in the Corinthian War and continued to play an active role in Greek politics. Sparta was later defeated by Thebes at the Battle of Leuctra in 371 BC. A