In its main features, the battle that followed was but a repetition of the day of Issos. Alexander again commanded the right wing and Parmeniôn the left. Again Darius posted himself in the centre of his line, and again the Greek mercenaries confronted the Macedonian phalanx. Again Alexander, at the head of the Companion cavalry, made havoc of the troops which guarded the royal standard; and again Darius, terror-struck at his near approach, ignominiously fled from the field. His flight gave once more the signal of defeat, and that too, as at Issos, just at the time when his cavalry on the right had made the position of Parmeniôn most critical.[9] Alexander was recalled from the pursuit of Darius, whom he was eagerly bent on capturing, by a messenger sent by Parmeniôn pressing for instant aid. He at once turned back. On his way he met the Persian and Parthian cavalry and the Indian troops now in full retreat. A combat close and hot followed. The fugitives were for the most part killed, but sold their lives dearly. On returning to the field Alexander found that his left wing was no longer in distress, but putting the enemy to rout, and he therefore started once more in pursuit of Darius. The fugitive escaped, however, to Ekbatana, the capital in former days of the Median kings. Accounts differ as to the numbers that were killed in this battle. Arrian says, absurdly enough, that 300,000 of the Persians were slain, and a greater number taken prisoners. Diodôros reduces the amount to 90,000, and Curtius to 40,000. The loss again on Alexander’s side is reckoned by Arrian at 100, by Curtius at 300, and by Diodôros at 500.[10] Alexander pursued the fugitive troops as far as Arbêla—the place which has given its name to the battle, though it was sixty miles distant from the field whereon it was fought. Here he found the baggage of Darius, and having enriched himself with its spoils, he advanced southward to Babylon. This great capital, which once gave law to all the nations of the East, had under the rule of the Achaimenids gradually declined both in wealth and importance. Its inhabitants, like the Egyptians, detested their Persian masters, who oppressed them and persecuted their religion. They issued therefore from their gates in a joyful procession to welcome the victor and present him with gifts. His first acts on entering the city were well calculated to make a favourable impression on their minds. He ordered the temple of Belus to be rebuilt, honoured that deity with a public sacrifice according to the Chaldaean ritual, and restored to his priests the immense revenues with which they had been endowed by the Assyrian kings.[11]