The first Peloponnesian squadron which attempted to move was promptly driven into Piræus by an Athenian fleet and blockaded. On the open revolt of some of the states, the Athenians for the first time brought into play their reserve fund and reserve navy--the emergency had arisen. While one after another of the subject cities revolted, the Athenians struck hard at Chios, and especially Miletus, and obtained marked successes. Meanwhile, a revolution in Samos had expelled the oligarchy and re-established the democracy, to which the Athenians accorded freedom, thereby securing an ally. In Lesbos also they recovered their challenged supremacy. Phrynicus now came into prominence as a shrewd commander and a crafty politician, while the intricate intrigues of Alcibiades, whose great object was to recover his position at Athens, created perpetual confusion. These events took place in the twentieth year of the war, and to them must be added a Lacedæmonian treaty with Persia through the satrap Tissaphernes. All the leading men, however, were engaged in playing fast and loose, each of them having his personal ambitions in view. Of this labyrinth of plots and counter-plots, the startling outcome was the sudden abrogation of the constitution at Athens and the capture of the government by a committee of five with a council of four hundred and a supplementary assembly of five thousand--in place of the whole body of citizens as formerly. The Five and the Four Hundred in effect were the Government, and established a reign of terror. At Athens, the administration thus formed was effective; but the army and fleet at Satnos repudiated the revolution and swore loyalty to the democracy, claiming to be the true representatives of the Athenian state. Moreover, they allied themselves with Alcibiades, expecting through him to receive Persian support; and, happily for Athens, he succeeded in restraining the fleet--which was still more than a match for all adversaries--from sailing back to the Piræus to subvert the rule of the Four Hundred. The more patriotic of the oligarchs saw, in fact, that the best hopes for the state lay in the establishment of a limited democracy; with the result that the extreme oligarchs, who would have joined hands with the enemy, were overthrown, and the rule of the Five Thousand replaced that of the Four Hundred, providing Athens with the best administration it had ever known. A great naval victory was won by the Athenian fleet, under the command of Thrasybulus, over a slightly larger Peloponnesian fleet at Cynossema. * * * * * XENOPHON Anabasis