Thus Athens and Aegina grappled together in war. The Persian was going about his own business, for his servant was constantly reminding him to remember the Athenians, and the Pisistratidae were at his elbow maligning the Athenians; moreover, Darius desired to take this pretext for subduing all the men of Hellas who had not given him earth and water. He dismissed from command Mardonius, who had fared so badly on his expedition, and appointed other generals to lead his armies against Athens and Eretria, Datis, a Mede by birth, and his own nephew Artaphrenes son of Artaphrenes; the order he gave them at their departure was to enslave Athens and Eretria and bring the slaves into his presence.