8.113.1
Those who were with Xerxes waited for a few days after the sea-fight and then marched away to Boeotia by the road by which they had come. Mardonius wanted to give the king safe conduct and thought the time of year unseasonable for war; it was better, he thought, to winter in Thessaly, and then attack the Peloponnese in the spring.
8.113.2
When they had arrived in Thessaly, Mardonius first chose all the Persians called Immortals, save only Hydarnes their general who said that he would not quit the king's person, and next, the Persian cuirassiers and the thousand horse and the Medes and Sacae and Bactrians and Indians, alike their infantrymen and the rest of the horsemen.
8.113.3
These nations he chose in their entirety; of the rest of his allies he picked out a few from each people, the best men and those whom he knew to have done some good service. The Persians whom he chose (men who wore torques and bracelets) were more in number than those of any other nation and next to them the Medes; these indeed were as many as the Persians, but not such stout fighters. Thereby the whole number, together with the horsemen, grew to three hundred thousand men.
ch. 114
8.114.1
Now while Mardonius was choosing his army and Xerxes was in Thessaly, there came an oracle from Delphi to the Lacedaemonians, that they should demand justice of Xerxes for the slaying of Leonidas and take whatever he should offer them. The Spartans then sent a herald with all speed. He found the army yet undivided in Thessaly, came into Xerxes' presence, and spoke as follows:
8.114.2
“The Lacedaemonians and the Heraclidae of Sparta demand of you, king of the Medes, that you pay the penalty for the death of their king, whom you killed while he defended Hellas.” At that Xerxes laughed, and after a long while, he pointed to Mardonius, who chanced to be standing by him and said, “Then here is Mardonius, who shall pay those you speak of such penalty as befits them.”
ch. 115
8.115.1
So the herald took that response and departed, but Xerxes left Mardonius in Thessaly. He himself journeyed with all speed to the Hellespont and came in forty-five days to the passage for crossing, bringing back with him as good as none (if one may say so) of his host.
8.115.2
Wherever and to whatever people they came, they seized and devoured its produce. If they found none, they would eat the grass of the field and strip the bark and pluck the leaves of the trees, garden and wild alike, leaving nothing—such was the degree of their starvation.
8.115.3
Moreover, pestilence and dysentery broke out among them on their way, from which they died. Some who were sick Xerxes left behind, charging the cities to which he came in his march to care for them and nourish them, some in Thessaly and some in Siris of Paeonia and in Macedonia.
8.115.4
In Siris he had left the sacred chariot of Zeus when he was marching to Hellas, but on his return he did not get it back again. The Paeonians had given it to the Thracians, and when Xerxes demanded it back, they said that the horses had been carried off from pasture by the Thracians of the hills who dwelt about the headwaters of the Strymon.
