Elated by these successes, the Athenians determined on a bolder flight, and forgetting the lessons of Pericles, thought of recovering the possessions which they had held on the mainland thirty years before. With this intention they planned an attack, which was to be carried out from three different points at once, on Boeotia. But the whole scheme proved a failure, and led to a severe defeat at Delium; and about the same time news arrived from Thrace which showed that the tide was turning, and should have warned them, if they were wise, to set bounds to their restless ambition. Brasidas had long since recovered from the wounds received at Pylos. The deep humiliation of Sparta, now reduced to become a suppliant for peace, filled him with shame and sorrow, and in the eighth year of the war he formed the bold design of organizing a campaign against the coast-towns of Thrace, which were among the most important of the Athenian tributaries. Having obtained the necessary commission from Sparta, he collected a force of seventeen hundred heavy-armed infantry, and in the summer following the disaster at Sphacteria, turned his steps northward, and arrived without mishap at the borders of Thessaly. The Thessalians generally were then on friendly terms with Athens, and, apart from this, the passage of so large a force through their territory caused suspicion and alarm among the inhabitants. But Brasidas was a man of rare gifts: endowed with more than a full share of the typical Spartan virtues, he combined with these a graciousness of manner, and a winning eloquence, which made him an equal of the most accomplished Athenian. He had, moreover, friends among the powerful nobles of Thessaly, who undertook to guide him in safety to the Macedonian frontier. On reaching the river Enipeus, he found his passage barred by a Thessalian force, who seemed resolved to dispute his progress. His courteous demeanour, and fair words, disarmed their hostility, and he was allowed to pass. Fearing, however, a general rising of the natives against him, and urged to despatch by his guides, he pushed on by forced marches, and entering the passes of Olympus, descended into the southern plain of Macedonia, whose king Perdiccas, a shifty and treacherous barbarian, though nominally in alliance with Athens, favoured the enterprise of Brasidas.