In the autumn of the year 481 B. C., the vast army thus raised by Xerxes arrived, from all quarters of the empire, at or near to Sardis; a large portion of it having been directed to assemble at Kritala in Kappadokia, on the eastern side of the Halys, where it was joined by Xerxes himself on the road from Susa.[23] From thence he crossed the Halys, and marched through Phrygia and Lydia, passing through the Phrygian towns of Kelænæ, Anaua, and Kolossæ, and the Lydian town of Kallatêbus, until he reached Sardis, where winter-quarters were prepared for him. But this land force, vast as it was (respecting its numbers, I shall speak farther presently), was not all that the empire had been required to furnish. Xerxes had determined to attack Greece, not by traversing the Ægean, as Datis had passed to Eretria and Marathon, but by a land force and fleet at once: the former crossing the Hellespont, and marching through Thrace, Macedonia, and Thessaly; while the latter was intended to accompany and coöperate. A fleet of one thousand two hundred and seven ships of war, besides numerous vessels of service and burden, had been assembled on the Hellespont and on the coasts of Thrace and Ionia; moreover, Xerxes, with a degree of forethought much exceeding that which his father Darius had displayed in the Scythian expedition, had directed the formation of large magazines of provisions at suitable maritime stations along the line of march, from the Hellespont to the Strymonic gulf. During the four years of military preparation, there had been time to bring together great quantities of flour and other essential articles from Asia and Egypt.[24] [23] Herodot. vii, 26-31. [24] Herodot. vii. 23-25.