Book VII
Polymnia
1. Now when the report came to Darius the son of Hystaspes of the battle which was fought at Marathon, the king, who even before this had been greatly exasperated with the Athenians on account of the attack made upon Sardis, then far more than before displayed indignation, and was far more desirous of making a march against Hellas. Accordingly at once he sent messengers to the various cities and ordered that they should get ready a force, appointing to each people to supply much more than at the former time, and not only ships of war, but also horses and provisions and transport vessels;966 and when these commands were carried round, all Asia was moved for three years, for all the best men were being enlisted for the expedition against Hellas, and were making preparations. In the fourth year however the Egyptians, who had been reduced to subjection by Cambyses, revolted from the Persians; and then he was even more desirous of marching against both these nations.
2. While Darius was thus preparing to set out against Egypt and against Athens, there arose a great strife among his sons about the supreme power; and they said that he must not make his expeditions until he had designated one of them to be king, according to the custom of the Persians. For to Darius already before he became king three sons had been born of his former wife the daughter of Gobryas, and after he became king four other sons of Atossa the daughter of Cyrus: of the first the eldest was Artobazanes, and of those who had been born later, Xerxes. These being not of the same mother were at strife with one another, Artobazanes contending that he was the eldest of all the sons, and that it was a custom maintained by all men that the eldest should have the rule, and Xerxes arguing that he was the son of Atossa the daughter of Cyrus, and that Cyrus was he who had won for the Persians their freedom. 3. Now while Darius did not as yet declare his judgment, it chanced that Demaratos also, the son of Ariston, had come up to Susa at this very same time, having been deprived of the kingdom in Sparta and having laid upon himself a sentence of exile from Lacedaemon. This man, hearing of the difference between the sons of Darius, came (as it is reported of him) and counselled Xerxes to say in addition to those things which he was wont to say, that he had been born to Darius at the time when he was already reigning as king and was holding the supreme power over the Persians, while Artobazanes had been born while Darius was still in a private station: it was not fitting therefore nor just that another should have the honour before him; for even in Sparta, suggested Demaratos, this was the custom, that is to say, if some of the sons had been born first, before their father began to reign, and another came after, born later while he was reigning, the succession of the kingdom belonged to him who had been born later. Xerxes accordingly made use of the suggestion of Demaratos; and Darius perceiving that he spoke that which was just, designated him to be king. It is my opinion however that even without this suggestion Xerxes would have become king, for Atossa was all-powerful. 4. Then having designated Xerxes to the Persians as their king, Darius wished to go on his expeditions. However in the next year after this and after the revolt of Egypt, it came to pass that Darius himself died, having been king in all six-and-thirty years; and thus he did not succeed in taking vengeance either upon the revolted Egyptians or upon the Athenians.
5. Darius being dead the kingdom passed to his son Xerxes. Now Xerxes at the first was by no means anxious to make a march against Hellas, but against Egypt he continued to gather a force. Mardonios however, the son of Gobryas,
