about 515, and was followed in the fifth century by other groups under Ezra and Nehemiah, who effected religious reforms and strove for ethnic purity. By this time Aramaic had replaced Hebrew as the vernacular and the official language of the Jews, though Hebrew remained the sacred tongue. The Jews who stayed in Babylon and resisted assimilation were the first members of what became known as the Diaspora.
The Persian capture of Babylon signalized more than the destruction of an empire. Then and there one era, the Semitic, ended; another era, the Indo-European, began. The days of Semitic empires were gone, not to return for more than a thousand years. And when they returned, they did so under the auspices of fresh representatives—the Arabians, who had played no important role in ancient international affairs. The Persians, who ushered in the Indo-European era, belonged to the Indo-Iranian branch of the family. In their mastery over the Semitic world they were succeeded by Macedonians, Romans and Byzantines, all of whom were Indo-Europeans. The petty states of Syria and Palestine now became part of a great empire, one of the largest of antiquity. Within a quarter of a century after its birth this empire was to comprise the whole civilized world from Egypt and the Ionian cities in Asia Minor to the Punjab in India and then to begin casting covetous eyes across the Hellespont into the only civilized part of Europe. The far-flung parts of the empire were brought together by better roads than had ever existed, by a uniform stamped coinage and by an official language, Aramaic. Syria, Palestine and Cyprus formed a trans-Euphrates satrapy or province, of which Damascus was the chief city.
The Persians used Phoenician ships in the conquest of Egypt by Cambyses (529-521) and in the attack on Greece under Xerxes (485-465). The Phoenicians evidently welcomed an opportunity to deal a blow to their ancient mari-
