Plutarch, Demosthenes
Bernadotte Perrin, Ed.

17. And when matters were inclining at last to war, since Philip was unable to keep quiet and the Athenians were being stirred up by Demosthenes, in the first place, he urged the Athenians to invade Euboea, which had been brought into subjection to Philip by its tyrants; and it was on his motion that they crossed over to the island and drove out the Macedonians. [2] In the second place, he came to the aid of the citizens of Byzantium and Perinthus when the Macedonian was making war upon them, by persuading the Athenian people to remit their hatred and forget the wrongs committed by each of these cities in the Social War,¹ and to send them a force,—the force which saved them. [3] Next, he went on an embassy to the Greek states, and by arguing with them and pricking them on brought almost all of them into a league against Philip, so that they raised a mercenary force of fifteen thousand foot and two thousand horse, apart from the citizen soldiery, and readily contributed money to pay them. It was at this time, as Theophrastus says, when the allies were demanding that their contributions be fixed within limits, that Crobylus the popular leader said: ‘War has no fixed rations.’ ²

[4] Greece was now in suspense as it thought of the future, and its peoples and cities were leaguing themselves together, Euboeans, Achaeans, Corinthians, Megarians, Leucadians, and Corcyraeans. But the most important struggle still remained for Demosthenes in bringing the Thebans to join the alliance, for they had a territory bounding that of Attica and a force ready to take the field, and at that time were accounted the best soldiers in Greece. [5] But it was no easy matter, in view of the recent benefits with which Philip had cultivated their favour during the Phocian war, to make the Thebans change sides, and especially because in the petty quarrels brought on by their proximity to Athens the differences which made for war between the two cities were all the while stirred up anew.