According to the Greek geographer
Strabo (
Geography, book 11, chapter 14),
Artaxias and
Zariadres were two generals (
strategoi) of the
Seleucid Empire who were granted control over the provinces of Greater Armenia and Sophene by the Seleucid ruler
Antiochus III the Great. The last ruler of Armenia before Artaxias and Zariadres was named
Orontes. The
Orontid (or Eruandid) dynasty was of Iranian origin and had ruled Armenia since at least 400 BC. According to
David Marshall Lang, it was in 200 BC that Artaxias, incited by Antiochus, overthrew Orontes and took power in Greater Armenia.
Movses Khorenatsi, an Armenian historian writing in the 5th century AD or later, records a story about the conflict between King Orontes (Eruand) and Artaxias (Artashes), ending in Orontes' death and Artaxias' ascension of the Armenian throne. This appears to agree with Strabo's information about the last ruler of Armenia before Artaxias being named Orontes, and with a Greek inscription discovered in the Orontid capital of
Armavir which refers to the death in battle of a ruler connected with Armenia. After the defeat of the Seleucids by the Romans at the
Battle of Magnesia in 190 BC, Artaxias and Zariadres made themselves autonomous kings. They were recognized as such by the Roman Senate according to the
Treaty of Apamea in 188 BC. Artaxias' descendants ruled Armenia until the 1st century AD. Scholars believe that Artaxias and Zariadres were not foreign generals, but local figures related to the previous Orontid dynasty. Evidence for this includes Artaxias' and Zariadres' Irano-Armenian (and not Greek) names, as well as inscriptions on boundary stones from Artaxias' time in which he calls himself an Orontid. According to historian
Nina Garsoïan, Artaxias and Zariadres likely belonged to different branches of the Orontid dynasty than the previous kings of Armenia.
Cyril Toumanoff writes that Artaxias was "to all appearances, a local dynast" and that his claim to Orontid descent was aimed at legitimizing his rule, although he may have been matrilineally descended from the Orontids.
Matthew P. Canepa considers the Artaxiad Iranian dynasts. ==Hellenistic influences==