Meanwhile, Athens was awakening to the possibilities of a great sea-empire, in consequence of her intervention having been invited in disputes among the Sicilian states. As the outcome, incited by the brilliant young Alcibiades, she resolved on the fatal Sicilian expedition. The expedition, planned under command of Alcibiades and Nicias, was dispatched in spite of the startling mutilation of the Hermæ, a sacrilegious performance attributed to Alcibiades. It had hardly reached Sicily when he was recalled, but made his escape and spent some years mainly in intriguing against Athens. The siege of Syracuse was progressing favourably, when the Spartan Gylippus was allowed to enter and put new life into the defence. Disaster followed on disaster both by sea and land; finally, the whole Athenian force was either cut to pieces or surrendered at discretion, to become the slaves of the Syracusans, both Nicias and Demosthenes being put to death. Meanwhile, the truce between Athens and Sparta had been ended, and war again declared. Sparta occupied permanently a post of the Attic territory, Deceleia, with merciless effect. The Sicilian disaster moved the islanders, notably Chios, to revolt, by Spartan help, against Athens. She, however, renovated her navy with unexpected vigour. But, with her fleets away, Alcibiades inspired oligarchical intrigues in the city; a _coup d'état_ gave the government to the leaders of a group of 400. The navy stood by the democratic constitution, the 400 were overthrown, and an assembly, nominally of 5,000, assumed the government. A great Athenian triumph at Arginusæ was followed later by a still more overwhelming disaster at Ægos Potami. The Spartan commander Lysander blockaded Athens; starvation forced her to surrender. Lysander established the government known as that of the Thirty Tyrants, who were headed by Kritias. Lysander's ascendancy created in Sparta a party in opposition to him; in the outcome, the Spartan king Pausanias helped in the overthrow of the Thirty at Athens by Thrasybulus, and the restoration of the Athenian democracy. Throughout, the conduct of the democratic party, at its best and its worst, contrasted favourably with that of the oligarchical faction. These eighty years were the great period of Athenian literature and art: of the Parthenon and Phidias; of Æschylus, the soldier of Marathon; then Sophocles and Euripides and Aristophanes; finally, of Socrates, not himself an author, but the inspirer of Plato, and the founder of ethical science; according to popular ideas, the typical Sophist, but in fact differing from the Sophists fundamentally. _III.--The Blotting Out of Hellas_