In the fourteenth year there were active hostilities between Argos, with which by this time Athens was in alliance, and Lacedæmon, issuing in the great battle of Mantinea, where there was an Athenian contingent with the Argives. This was notable especially as completely restoring the prestige of the Lacedæmonian arms, their victory being decisive. The result was a new treaty between Sparta and Argos, and the dissolution of the Argive-Athenian alliance; but this was once more reversed in the following year, when the Argive oligarchy was attacked successfully by the popular party. The next year is marked by the high-handed treatment of the island of Melos by the Athenians. This was one of the very few islands which had not been compelled to submit to Athens, but had endeavoured to remain neutral. Thither the Athenians now sent an expedition, absolutely without excuse, to compel their submission. The Melians, however, refused, and gave the Athenians a good deal of trouble before they could be subdued, when the adult male population was put to death, and the women and children enslaved. At this time the Athenians resolved, under colour of an appeal for assistance from the Sicilian city of Egesta, deliberately to set about the establishment of their empire in Sicily. The aggressive policy was vehemently advocated by Alcibiades, and opposed by Nicias. Nevertheless, he, with Alcibiades and Lamachus, was appointed to command the expedition, which was prepared on a scale of unparalleled magnificence. It was on the point of starting, when the whole city was stirred to frenzy by the midnight mutilation of the sacred images called Hermæ, an act laid at the door of Alcibiades, along with many other charges of profane outrages. Of set purpose, however, the enemies of Alcibiades refused to bring him to trial. The expedition sailed. The Syracusans were deaf to the warnings of Hermocrates until the great fleet had actually arrived at Rhegium. Nicias was now anxious to find an excuse, in the evident falsity of statements made by the Egestans, for the fleet to content itself with making a demonstration and then returning home. The scheme of Alcibiades, however, was adopted for gaining over the other Sicilian states in order to crush Syracuse. But at this moment dispatches arrived requiring the return of Alcibiades to stand trial. Athens was in a panic over the Hermæ affair, which was supposed to portend an attempt to reestablish the despotism which had been ended a hundred years before by the expulsion of the Pisistratidæ. Alcibiades, however, made his escape, and for years pursued a life of political intrigue against the Athenian government.