XVII. When war finally broke out, as Philip was unable to remain quiet, while the Athenians were urged on by Demosthenes, his first measure was to prevail upon the Athenians to recover Euboea, which had been handed over to Philip by its local rulers. In pursuance of a decree which bore the name of Demosthenes, the Athenians crossed into the island and drove out the Macedonians. Next, as Philip was besieging Byzantium and Perinthus, Demosthenes prevailed upon his countrymen to lay aside their anger and forget the wrongs which they had received from the people of those cities in the social war, and to send them a reinforcement by which they were saved. After this he travelled through Greece, exciting a spirit of resistance to Philip by his speeches, until he succeeded in forming nearly all the Greek cities into a confederacy against Philip, organised an army of fifteen thousand infantry and two thousand cavalry, besides the local forces of each city, and induced them to subscribe cheerfully for the maintenance of the mercenaries and the expenses of the war. At this time, we are told by Theophrastus that, when the allies demanded that their contributions should be limited to some fixed sum, Krobylus the Athenian orator answered that war feeds not by a fixed allowance.[129] Greece was now in a flutter of expectation, and the people of Euboea, Achaia, Corinth, Megara, Leukas and Korkyra were all in arms. Yet the hardest task of all still remained for Demosthenes to accomplish, namely, to induce the Thebans to join the alliance, because their territory bordered upon that of Athens, and their army was very important, for at that time Thebes was the most warlike state in Greece. It was no easy matter to win over the Thebans, who had just received signal assistance from Philip in their war against the Phokians, and so were inclined to take his side, besides which, their being such near neighbours to the Athenians caused perpetual jealousies and quarrels between the two countries, which were renewed upon the most trifling occasions.