With this intent, negotiations were opened with Athens, through the medium of Alexander the Macedonian. When this line of action proved ineffective, he brought pressure to bear upon the Athenians by once more invading their territory and occupying Athens. DESIGNS OF MARDONIUS. This again had no effect, except to make them even more stubborn in their refusal to treat.

The first alternative plan had failed at its outset, so he now resorted to the second.

After burning Athens and committing devastation in Attica he retired into Bœotia, using Thebes as his base of operations.

There are two remarkable facts in connection with this movement

The disaster at Salamis, and the consequent retirement of the Persian army to Thessaly, had not shaken the loyalty of Bœotia to the Persian cause, and this despite the fact that the Bœotians were not at the end of 480 deeply committed either to the Persian, or against the Greek. Bœotians had, indeed, been present in Xerxes’ army when it invaded Attica; but there is nothing whatever on record which can favour the supposition that the Bœotians had actually fought on the Persian side previous to the winter of 480–479. Consequently they were not deeply committed against the cause of patriotism. They had powerful excuses to urge for their conduct; and had they come over to the side of the defence in that winter, but little fault could have been found with them, even by the most bigoted patriots. Sentiment was not a characteristic of the Bœotian. His policy was ever to join the side from which he had most to expect; and his attitude during the time Mardonius was in Thessaly shows clearly that he was convinced that his interest lay with the Persian. The ruling party in Bœotia believed that their country was destined to become a part of the Persian Empire; and, with the selfishness of interest common to oligarchies, were prepared to accept their fate. They must have been convinced, rightly or wrongly, that Mardonius did not intend to desert them. The conviction was probably correct.

Mardonius’ retirement from Attica was an outward and visible sign of his renunciation of all idea of the complete conquest of Greece. If he had no other scheme of conquest in his mind at that moment, why did he stay his retreat in South Bœotia? Because, so Herodotus says, he thought that that country was more suitable for his cavalry. But that implies that he entertained an expectation which, on the mere question of fact as recorded by Herodotus, he could not possibly have entertained,—that the Greeks would follow him into Bœotia. Up to that time they had absolutely declined to take the offensive; and yet at this moment Mardonius must have had reason to believe that he could force them to change their whole policy in the war, and to become the assailant in a region highly unfavourable to their type of force, and highly favourable to his own.

It was a remarkable situation, the clue to which is not given in any direct statement in Herodotus. It must, therefore, be sought in the actions of the two opponents.

The opening of the campaign of 479 reveals several very important and well-nigh inexplicable changes on the Greek side. The most remarkable is the complete change in the command of the two principal contingents of the Greek forces.

In spite of the conspicuous success of the preceding year, Themistocles and Eurybiades are both set aside, and Xanthippos, Aristides, Pausanias, and Leutychides take their place. The change is extraordinary, unexpected, unexplained. Probably a combination of various motives brought it about, but, in the absence of all real evidence, nothing more than a guess can be made at what they were. The fact that the remainder of the war would have to be fought out on land rather than by sea had doubtless something to do with it. In the most remarkable case, that of Themistocles, politics may have played a part. It has also been suggested that his vexation at the refusal of the Greek fleet at Andros to follow his advice, and to carry the war to the Asian coast, led him to throw up his command.

As far as the course of the war is concerned, the main difference between the general characteristics of the campaign of 480 and 479 brought about by the change of command, is that for the ability of Themistocles to control circumstances was substituted an ability on the part of the new commanders to be guided by them.