But it was while the Lacedæmonians were yet in Attica, and during the first freshness of the terrible malady, that Periklês equipped and conducted from Peiræus an armament of one hundred triremes, and four thousand hoplites to attack the coasts of Peloponnesus: three hundred horsemen were also carried in some horse-transports, prepared for the occasion out of old triremes. To diminish the crowd accumulated in the city, was doubtless of beneficial tendency, and perhaps those who went aboard, might consider it as a chance of escape to quit an infected home. But unhappily they carried the infection along with them, which desolated the fleet not less than the city, and crippled all its efforts. Reinforced by fifty ships of war from Chios and Lesbos, the Athenians first landed near Epidaurus in Peloponnesus, ravaging the territory, and making an unavailing attempt upon the city: next, they made like incursions on the more southerly portions of the Argolic peninsula,—Trœzen, Halieis, and Hermionê; and lastly attacked and captured Prasiæ, on the eastern coast of Laconia. On returning to Athens, the same armament was immediately conducted, under Agnon and Kleopompus, to press the siege of Potidæa, the blockade of which still continued without any visible progress. On arriving there, an attack was made on the walls by battering engines, and by the other aggressive methods then practised; but nothing whatever was achieved. In fact, the armament became incompetent for all serious effort, from the aggravated character which the distemper here assumed, communicated by the soldiers fresh from Athens, even to those who had before been free from it at Potidæa. So frightful was the mortality, that out of the four thousand hoplites under Agnon, no less than ten hundred and fifty died in the short space of forty days. The armament was brought back in this melancholy condition to Athens, while the reduction of Potidæa was left, as before, to the slow course of blockade.[289] [289] Thucyd. ii, 56-58.