The Seleucids
In the struggle for power after Alexander’s death, Seleucus I brought under his control the whole eastern part of Alexander’s empire. But even before he had consolidated his control over this territory, the eastern provinces on the Indian frontier had begun to revolt. By about 304 bc Seleucus was forced to abandon these to Chandragupta, the founder of the great Maurya empire in India. This was a serious loss to the Seleucids, for they lost not only the Indian territory conquered by Alexander but also frontier districts west of the Indus River. As recompense, Seleucus received 500 elephants, which he took back with him to Syria. From this time on, the west was dominant in the Seleucids’ politics, to the detriment of their eastern possessions. This near disinterest of the Seleucids in the far-off eastern regions must have alienated the Greeks who had settled there, far from their homeland, and the thought of taking back their full independence could not have been far from their minds.
Soon afterward (c. 290–280 bc) the two eastern provinces of Margiana and Aria suffered an invasion by nomads. But the invasion was repelled, and the nomads were pushed back beyond the Jaxartes. Demodamas, a general to the first two Seleucid kings, crossed the river and even put up altars to Apollo, ancestor of the dynasty. Alexandria in Margiana and Heraclea in Aria, founded by Alexander, were rebuilt by Antiochus I under the names Antioch and Achaea, respectively, and a wall nearly 100 miles (160 km) long was put up to protect the oasis of Merv against future invasions, the menace of which was never far away. Patrocles received a commission to explore the Caspian Sea.
Seleucus I and his successors hoped to Hellenize Asia and held the conviction that the Greeks and Macedonians were a superior people and the bearers of a superior civilization. A network of cities and military colonies was built to assure the stability of a state whose inhabitants would be Asians. The Greek language made deep inroads, especially among the families of those numerous Greeks who married the local women and among those engaged in commerce. But after the 2nd century bc and the slowing of the Greco-Macedonian immigration, the Greek language lost ground and the local element became dominant.
The people of Iran, particularly those in the upper stratum of society, borrowed nothing from Hellenism but its exterior forms. Even the Iranians who lived in such cities as Seleucia or Susa do not seem to have been deeply affected by Greek ideas.