Diodotus-I

Diodotus became governor of Bactria during Antiochus II’s reign. The Babylonian Astronomical Diaries record that an unnamed Bactrian satrap sent a herd of twenty war elephants to Babylon at the beginning of 273 BC to join the Seleucid forces fighting against Ptolemaic Egypt in the First Syrian War. This satrap may have been Diodotus, or a predecessor.. Archaeological evidence for the period comes largely from excavations of the city of Ai-Khanoum, where this period saw the expansion of irrigation networks, the construction and expansion of civic buildings, and some military activity, probably raiding by nomads from the Central Asian steppe. As satrap, Diodotus was probably involved in these matters, though the specifics are not recoverable. Before Diodotus came to power, there was already a mint in Bactria based at Ai-Khanoum or at Bactra, which minted royal coinage in the name of the Seleucid sovereign, with the reigning Seleucid king’s portrait on the obverse and an image of Apollo, the Seleucid patron deity, sitting on an omphalus. As satrap, Diodotus continued to issue these coins, in the name of Antiochus II. This included gold staters, silver tetradrachms, drachms, and hemidrachms, and some bronze coins. Diodotus introduced a new coinage also while still satrap, which consisted of a large number of silver tetradrachms and, later, a small number of gold staters. These coins have the head of a male figure on the obverse, presumably Diodotus himself, shown wearing the diadem—a band of cloth wrapped around the head, with two strips hanging down the back, which had been the standard symbol of Hellenistic kingship since the time of Alexander the Great. The image seems to gradually age over time, suggesting that it was intended as a realistic portrait of Diodotus. The reverse of these coins abandoned the Seleucid God Apollo in favour of a depiction of Zeus preparing to throw his thunderbolt. The choice of Zeus may have been intended as a reference to Diodotus himself whose name meant ‘Gift of Zeus’ in Greek. Towards the end of this series, a small wreath appears on the reverse to the left of Zeus. The wreath was a Greek symbol of victory. Frank Holt suggests that it commemorated a victory over the Parthians and that this victory was also the source of Diodotus’ epithet soter (savour). Other Hellenistic kings, such as Antiochus I Soter and Attalus I Soter of Pergamum took this title to commemorate victories over existential barbarian threats. Diodotus may have done the same. This may further have been the occasion of Diodotus I’s assumption of the royal title of king (basileus)—as a similar victory was for Attalus I. Diodotus also issued a bronze coinage.