To display their force and take revenge by disembarking and ravaging parts of Peloponnesus, was doubtless of much importance to Athens during this first summer of the war: though it might seem that the force so employed was quite as much needed in the conquest of Potidæa, which still remained under blockade,—and of the neighboring Chalkidians in Thrace, still in revolt. It was during the course of this summer that a prospect opened to Athens of subduing these towns, through the assistance of Sitalkês, king of the Odrysian Thracians. That prince had married the sister of Nymphodôrus, a citizen of Abdêra; who engaged to render him, and his son Sadokus, allies of Athens. Sent for to Athens and appointed proxenus of Athens at Abdêra, which was one of the Athenian subject allies, Nymphodôrus made this alliance, and promised, in the name of Sitalkês, that a sufficient Thracian force should be sent to aid Athens in the reconquest of her revolted towns: the honor of Athenian citizenship was at the same time conferred upon Sadokus.[255] Nymphodôrus farther established a good understanding between Perdikkas of Macedonia and the Athenians, who were persuaded to restore to him Therma, which they had before taken from him. The Athenians had thus the promise of powerful aid against the Chalkidians and Potidæans: yet the latter still held out, with little prospect of immediate surrender. Moreover, the town of Astakus, in Akarnania, which the Athenians had captured during the summer, in the course of their expedition round Peloponnesus, was recovered during the autumn by the deposed despot Euarchus, assisted by forty Corinthian triremes and one thousand hoplites. This Corinthian armament, after restoring Euarchus, made some unsuccessful descents both upon other parts of Akarnania and upon the island of Kephallênia: in the latter, they were entrapped into an ambuscade, and obliged to return home with considerable loss.[256] [255] Thucyd. ii, 29. [256] Thucyd. ii, 33.