Probably the Thebans were at this time much pressed, and prevented from acting effectively against the Phokians, by want of money. We know at least that in the midst of the Phokian war they hired out a force of 5000 hoplites commanded by Pammenes, to Artabazus the revolted Phrygian satrap. Here Pammenes with his soldiers acquired some renown, gaining two important victories over the Persians.[539] The Thebans, it would seem, having no fleet and no maritime dependencies, were less afraid of giving offence to the Great King than Athens had been, when she interdicted Chares from aiding Artabazus, and acquiesced in the unfavorable pacification which terminated the Social War. How long Pammenes and the Thebans remained in Asia, we are not informed. But in spite of the victories gained by them, Artabazus was not long able to maintain himself against the Persian arms. Three years afterwards, we hear of him and his brother-in-law Memnon as expelled from Asia, and as exiles residing with Philip of Macedon.[540] [539] Diodor. xvi. 34. [540] Diodor. xvi. 52. While Pammenes was serving under Artabazus, the Athenian general Chares recaptured Sestos in the Hellespont, which appears to have revolted from Athens during the Social War. He treated the captive Sestians with rigor; putting to death the men of military age, and selling the remainder as slaves.[541] This was an important acquisition for Athens, as a condition of security in the Chersonese as well as of preponderance in the Hellespont. [541] Diodor. xvi. 34. Alarmed at the successes of Chares in the Hellespont, the Thracian prince Kersobleptes now entered on an intrigue with Pammenes in Asia, and with Philip of Macedon (who was on the coast of Thrace, attacking Abdêra and Maroneia), for the purpose of checking the progress of the Athenian arms. Philip appears to have made a forward movement, and to have menaced the possessions of Athens in the Chersonese; but his access thither was forbidden by Amadokus, another prince of Thrace, master of the intermediate territory, as well as by the presence of Chares with his fleet off the Thracian coast.[542] Apollonides of Kardia was the agent of Kersobleptes; who however finding his schemes abortive, and intimidated by the presence of Chares, came to terms with Athens, and surrendered to her the portion of the Chersonese which still remained to him, with the exception of Kardia. The Athenians sent to the Chersonese a farther detachment of Kleruchs or out-settlers, for whom considerable room must have been made as well by the depopulation of Sestos, as by the recent cession from Kersobleptes.[543] It was in the ensuing year (352 B. C.) that the Athenians also despatched a fresh batch of 2000 citizens as settlers to Samos, in addition to those who had been sent thither thirteen years before.[544] [542] Polyænus, iv. 2, 22, seems to belong to this juncture.