 The motive behind was to strengthen Sasanian authority in the Caucasus and utilize the position of the Iberian capital Mtskheta as an entrance to the important passes through the Caucasus Mountains.This was of so high importance to Bahram II, that he allegedly himself went to Mtskheta in order to secure Mirian III's position.He also sent one of his grandees named Mirvanoz (also a Mihranid) to the country in order to act as the guardian of Mirian III, who was then merely aged seven.