About ONS

The Office for National Statistics (ONS) is the UK’s largest independent producer of official statistics and is the recognised national statistical institute for the UK. It is responsible for collecting and publishing statistics related to the economy, population and society at national, regional and local levels. It also conducts the census in England and Wales every ten years. ONS plays a leading role in national and international good practice in the production of official statistics. It is the executive office of the UK Statistics Authority and although they are separate, they are still closely related.the first time in Sasanian history that a Parthian dynast challenged the legitimacy of the Sasanian family by rebelling. Azen Gushnasp was sent to suppress the rebellion, but was murdered in Hamadan by Zadespras, one of his own men. Another force under Sarames the Elder was also sent to stop Bahram, who defeated him and had him trampled to death by war elephants. The route taken by Bahram was presumably the northern edge of the Iranian plateau, where in 590 he had repelled a Byzantine-funded attack by Iberians and others on Adurbadagan, and suffered a minor setback by a Byzantine force employed in Transcaucasia. He then marched southwards Media, where Sasanian monarchs, including Hormizd, ordinarily resided during the summer. 

Hormizd then left for the Great Zab in order