War, on behalf of the Thessalians, as described above. Since Athens was also a combatant in the Sacred War, the war between Athens and Macedon was inextricably linked with the progress of the Sacred War. In 352 BC, Philip's erstwhile ally, the Chalkidian League (led by Olynthos), alarmed by Philip's growing power, sought to ally themselves with Athens, in clear breach of their alliance with Philip. In response, Philip attacked Chalkidiki in 349 BC, and by 348 BC, had completely destroyed the Chalkidian League, razing Olynthos in the process. The prominent Athenian politician Philocrates had suggested offering Philip peace in 348 BC, during the Olynthian war. The war between Athens and Philip thus continued through 347 BC, as did the Sacred War. In early 346 BC, Philip let it be known that he intended to march south with the Thessalians, though not where or why. The Phocians thus made plans to defend Thermopylae, and requested assistance from the Spartans and the Athenians, probably around 14 February. The Spartans dispatched Archidamus III with 1,000 hoplites, and the Athenians ordered everyone eligible for military service under the age of 40 to be sent to the Phocians' aid. However, between the Phocians' appeal and the end of the month, all plans were upset by the return of Phalaikos to power in Phocis; the Athenians and the Spartans were subsequently told that they would not be permitted to defend Thermopylae. It is not clear from the ancient sources why Phalaikos was returned to power, nor why he adopted this dramatic change of policy. Cawkwell suggests, based on remarks of Aeschines, that the Phocian army restored Phalaikos because they had not been properly paid, and further that Phalaikos, realizing that the army could not be paid and that the Phocians could no longer hope to win the war, decided to try to negotiate a peace settlement with Philip. Peace between Macedon and Athens When the Athenians received this news, they rapidly changed policy. If Thermopylae could no longer be defended, then Athenian security could no longer be guaranteed. By the end of February, the Athenians had dispatched an embassy, including Philocrates, Demosthenes and Aeschines, to Philip to discuss peace between Athens and Macedon. The embassy had two audiences with Philip, in which each side presented their proposals for the terms of the peace settlement. The embassy then returned to Athens to present the proposed terms