These princes were deprived of the kingdom -- and their successor, Ariobarzanes, also, a little later -- by Mithridates, king of Pontus. The Mithridatic war grew out of this event, among others, -- a very great war, full of vicissitudes to many nations and lasting nearly forty years. During this time Syria had many kings, succeeding each other at brief intervals, but all of the royal lineage, and there were many changes and revolts from the dynasty. The Parthians, who had previously revolted from the rule of the Seleucidæ, seized Mesopotamia, which had been subject to that house. Tigranes, the son of Tigranes, king of Armenia, who had annexed many neighboring principalities, and from these exploits had acquired the title of King of Kings, attacked the Seleucidæ because they would not acknowledge his supremacy. Antiochus Pius was not able
to withstand him. Tigranes conquered all of the Syrian
peoples this side of the Euphrates as far as Egypt. He took Cilicia at the same time (for this was also subject to the Seleucidæ) and put his general, Magadates, in command of all these conquests for fourteen years.