Peloponnesian War
The Athenian defeat

The faction hostile to Alcibiades triumphed in Athens following a minor Spartan victory by their skillful general Lysander at the naval battle of Notium in 406 BC. Alcibiades was not re-elected general by the Athenians and he exiled himself from the city. He would never again lead Athenians in battle. Athens won the naval battle of Arginusae. The Spartan fleet under Callicratidas lost 70 ships and the Athenians lost 25 ships. But, due to bad weather, the Athenians were unable to rescue their stranded crews or finish off the Spartan fleet. Despite their victory, these failures caused outrage in Athens and led to a controversial trial. The trial resulted in 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.
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