(M531) Alcibiades, in commencing his political life, departed from his family traditions; for he was a relative of Pericles, and became a partisan of the oligarchal party. But he soon changed his polities, on receiving a repulse from the Spartans, who despised him, and he became a violent democrat. His first memorable effort was to bring Argos, then in league with Sparta, into alliance with Athens, in which he was successful. He then cheated the Lacedæmonian envoys who were sent to protest against the alliance and make other terms, and put them in a false position, and made them appear deceitful, and thus arrayed against them the wrath of the Athenians. As Alcibiades had prevailed upon these envoys, by false promises and advice, to act a part different from what they were sent to perform, Nicias was sent to Sparta to clear up embarrassments, but failed in his object, upon which Athens concluded an alliance with Argos, Elis, and Mantinea, which only tended to complicate existing difficulties. (M532) Shortly after this alliance was concluded, the Olympic games were celebrated with unusual interest, from which the Athenians had been excluded during the war. Here Alcibiades appeared with seven chariots, each with four horses, when the richest Greeks had hitherto possessed but one, and gained two prizes. He celebrated his success by a magnificent banquet more stately and expensive than those given by kings. But while the Athenians thus appeared at the ninetieth Olympiad, the Lacedæmonians were excluded by the Eleians, who controlled the festival, from an alleged violation of the Olympic truce, but really from the intrigues of Alcibiades. (M533) The subsequent attack of Argos and Athens on Epidaurus proved that the peace between Athens and Sparta existed only in name. It was distinctly violated by the attack of Argos by the Lacedæmonians, Bœotians, and Corinthians, and the battle of Mantinea opened again the war. This was decided in favor of the Lacedæmonians, with a great loss to the Athenians and their allies, including both their generals, Laches and Nicostratus. (M534) The moral effect of the battle of Mantinea, B.C. 418, was overwhelming throughout Greece, and re-established the military prestige of Sparta. It was lost by the withdrawal of three thousand Eleians before the battle, illustrating the remark of Pericles that numerous and equal allies could never be kept in harmonious co-operation. One effect of the battle was a renewed alliance between Sparta and Argos, and the re-establishment of an oligarchal government in the latter city. Mantinea submitted to Sparta, and the Achaian towns were obliged to submit to a remodeling of their political institutions, according to the views of Sparta. The people of Argos, however, took the first occasion which was presented for regaining their power, assisted by an Athenian force under Alcibiades, and Argos once again became an ally of Athens.