Editing Mithridates I of Parthia (section)

===Wars in the east===
[[Image:Coin of Mithridates I of Parthia, Hamadan mint. Elephant standing on the reverse.jpg|thumb|Bronze coin of Mithridates I, with the image of an elephant on the reverse, possibly as a celebration of the conquest of [[Bactria]]]]
He first turned his sights on the Greco-Bactrian Kingdom which had been considerably weakened as a result of its wars against the neighbouring [[Sogdia]]ns, [[Drangiana]]ns and [[Indian people|Indians]].<ref name="JUS"/> The new Greco-Bactrian king [[Eucratides I]] ({{reign|171|145|era=BC}}) had usurped the throne and was as a result met with opposition, such as the rebellion by the [[Aria (region)|Arians]], which was possibly supported by Mithridates I, as it would serve to his advantage.{{sfn|Olbrycht|2010|p=234}} Sometime between 163–155 BC, Mithridates I invaded the domains of Eucratides, whom he defeated and seized Aria, [[Margiana]] and western [[Bactria]] from.{{sfn|Olbrycht|2010|p=237}} Eucratides was supposedly made a Parthian vassal, as is indicated by the classical historians Justin and [[Strabo]].{{sfn|Olbrycht|2010|pp=236–237}} [[Merv]] became a stronghold of Parthian dominance in the northeast.{{sfn|Olbrycht|2010|p=237}} Some of Mithridates I's bronze coins portray an elephant on the reverse with the legend "of the Great King, Arsaces."{{sfn|Dąbrowa|2010|p=40}} The Greco-Bactrians minted coins with images of elephants, which suggests that Mithridates I's coin mints of the very animal was possibly to celebrate his conquest of Bactria.{{sfn|Dąbrowa|2010|p=40}}