When spring was now past,[26] he led his army from Baktra to invade the Indians, leaving Amyntas in the land of the Baktrians with 3500 horse and 10,000 foot. In ten days he crossed the Kaukasos[27] and arrived at the city of Alexandreia[28] which he had founded in the land of the Parapamisadai[29] when he first marched to Baktra. The ruler whom he had then set over the city he dismissed from his office because he thought he had not discharged its duties well. He recruited the population of Alexandreia with fresh settlers from the surrounding district, and also with such of his soldiers as were unfit for further service.[30] He then ordered Nikanor, one of the Companions, to take charge of the city itself and regulate its affairs, but he appointed Tyriaspes satrap of the land of the Parapamisadai and the rest of the country as far as the river Kôphên.[31] Having reached the city of Nikaia[32] and sacrificed to the goddess Athêna, he despatched a herald to Taxilês[33] and the chiefs on this side of the river Indus, directing them to meet him where it was most convenient for each. Taxilês accordingly and the other chiefs did meet him and brought him such presents as are most esteemed by the Indians. They offered also to give him the elephants which they had with them amounting in number to five-and-twenty. Having here divided his army, he despatched Hêphaistiôn and Perdikkas with the brigades of Gorgias, Kleitos,[34] and Meleager, half of the companion cavalry, and the whole of the mercenary cavalry, to the land of Peukelaôtis[35] and the river Indus.[36] He ordered them either to seize by force whatever places lay on their route or to accept their submission if they capitulated, and when they came to the Indus to make whatever preparations were necessary for the transport of the army across that river. They were accompanied on their march by Taxilês and the other chiefs. On reaching the river Indus they began to carry out the instructions which they had received from Alexander. One of the chiefs, however, Astês, a prince of the land of Peukelaôtis, revolted, but perished in the attempt, besides involving in ruin the city to which he had fled for refuge, which the troops under Hêphaistiôn captured in thirty days. Astês himself fell, and Sanggaios,[37] who had some time before fled from Astês and deserted to Taxilês, a circumstance which guaranteed his fidelity to Alexander, was appointed governor of the city. _Chapter XXIII.—Alexander wars against the Aspasians_