The Persians came again. When the report came to Darius 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 still more determined to make a campaign against Hellas. He at once sent messengers to the various cities of the Empire and ordered that they should get ready their forces. Each city or community was called upon to send more men than at the former time, and to send also ships of war, and horses, provisions and transport vessels. When these commands had been carried all 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. {137} But before the expedition was ready, a rebellion broke out in Egypt, and soon after Darius died, and "thus he did not succeed in taking vengeance upon the Athenians." Darius was succeeded by his son Xerxes. The first thing he did was to crush Egypt, and then he turned his attention to Greece. Mardonius, the general who had been forced to retire from Thrace after the wreck of the fleet off Mount Athos, was anxious to persuade the King to undertake another invasion. He probably wanted to retrieve the reputation he had lost on the former occasion, and hoped that if Greece became a Persian province, he would be made governor. "Master," he would say to the King, "it is not fitting that the Athenians, after having done to the Persians very great evil, should not pay the penalty for that which they have done," and he would add that Greece was "a very fair land and bore all kinds of trees that are cultivated for fruit and that the King alone of all mortals was worthy to possess it." Xerxes did not need much persuasion. He came of a race of kings whose word was the law of the Medes and Persians that changeth not, and his wrath was great against the states that had not only refused to submit to the Persian King, but had actually defeated his army in battle. He would wreak his vengeance upon them for what they had done, and he declared that he would march an army through Europe against Greece, in order, as he said, "that I may take vengeance on the Athenians for all the things which they have done both to the Persians {138} and to my father. I will not cease until I have conquered Athens and burnt it with fire."