Datis embarked his forces in the fleet that awaited them; and coasting along the shores of Asia Minor till he was off Samos, he thence sailed due westward through the AEgean Sea for Greece, taking the islands in his way. The Naxians had, ten years before, successfully stood a siege against a Persian armament, but they now were too terrified to offer any resistance, and fled to the mountain-tops, while the enemy burnt their town and laid waste their lands. Thence Datis, compelling the Greek islanders to join him with their ships and men, sailed onward to the coast of Euboea. The little town of Carystus essayed resistance, but was quickly overpowered. He next attacked Eretria. The Athenians sent four thousand men to its aid. But treachery was at work among the Eretrians; and the Athenian force received timely warning from one of the leading men of the city to retire to aid in saving their own country, instead of remaining to share in the inevitable destruction of Eretria. Left to themselves, the Eretrians repulsed the assaults of the Persians against their walls for six days; on the seventh day they were betrayed by two of their chiefs and the Persians occupied the city. The temples were burnt in revenge for the burning of Sardis, and the inhabitants were bound and placed as prisoners in the neighbouring islet of AEgylia, to wait there till Datis should bring the Athenians to join them in captivity, when both populations were to be led into Upper Asia, there to learn their doom from the lips of King Darius himself. Flushed with success, and with half his mission thus accomplished, Datis reimbarked his troops, and crossing the little channel that separates Euboea from the mainland, he encamped his troops on the Attic coast at Marathon, drawing up his galleys on the shelving beach, as was the custom with the navies of antiquity. The conquered islands behind him served as places of deposit for his provisions and military stores. His position at Marathon seemed to him in every respect advantageous; and the level nature of the ground on which he camped was favourable for the employment of his cavalry, if the Athenians should venture to engage him. Hippias, who accompanied him, and acted as the guide of the invaders, had pointed out Marathon as the best place for a landing, for this very reason. Probably Hippias was also influenced by the recollection, that forty-seven years previously he, with his father Pisistratus, had crossed with an army from Eretria to Marathon, and had won an easy victory over their Athenian enemies on that very plain, which had restored them to tyrannic power. The omen seemed cheering. The place was the same; but Hippias soon learned to his cost how great a change had come over the spirit of the Athenians.