Eucratides

Eucratides I
Greco-Bactrian king
Portrait of Eucratides.
Reign	171–145 BC
Father	Possibly Heliokles
Mother	Possibly Laodice

Eucratides I (Greek: Εὐκρατίδης Α΄; reigned c. 171–145 BC), sometimes called Eucratides the Great, was one of the most important Greco-Bactrian kings, descendants of dignitaries of Alexander the Great. He uprooted the Euthydemid dynasty of Greco-Bactrian kings and replaced it with his own lineage. He fought against the Indo-Greek kings, the easternmost Hellenistic rulers in northwestern India, temporarily holding territory as far as the Indus, until he was finally defeated and pushed back to Bactria. Eucratides had a vast and prestigious coinage, suggesting a rule of considerable importance.

Eucratides came to the throne by overthrowing the dynasty of Euthydemus I in Bactria, whose son Demetrius was conquering northwestern India. The king whom Eucratides dethroned in Bactria was probably Antimachus I.

It is unclear whether Eucratides was a Bactrian official who raised a rebellion, or, according to some scholars, a cousin of the Seleucid king Antiochus IV Epiphanes who was trying to regain the Bactrian territory. Justin explains that Eucratides acceded to the throne at about the same time as Mithridates, whose rule is accurately known to have started in 171 BC, thereby giving an approximate date for the accession of Eucratides:

Some of the coins of Eucratides probably represent his parents, where his father is named Heliocles, and his mother, who is thought to be Laodice, is wearing a royal diadem. Laodice may have been a member of the Seleucid imperial house.

Having become master of Bactria, Eucratides also conquered the western parts of the Indo-Greek kingdom. According to the single remaining source, Roman historian Justin, Eucratides defeated Demetrius of India, but the identity of this king is uncertain: he could be either Demetrius I, or Demetrius II.