Sacred War
Athens and Macedon had been at war since 356 BC, after Philip's capture of the Athenian colonies of Pydna and Potidea. Philip had then been drawn into the Sacred 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.