The Persian Heritage Journal has published an article by Kaveh Farrokh on the historical background of factors that led to the revolt of Babak Khorramdin:
Farrokh, K. (2014). An Overview of the Historical Circumstances that led to the Revolts of Babak Khorramdin. Volume XIX, No. 74, Summer, pp.21-23.
An ingress into Babak Khorramdin’s Castle of Bazz in Iran’s Azerbaijan province in the northwest (Picture source: Pouya Yazdchi). Built during the Partho-Sassanian eras, Bazz proved to be a formidable fortress. Bazz finally fell to the Caliphate’s Turkish troops in August 15, 837 CE. Babak was executed five months later by the Caliphate in Samara (in modern Iraq) in January 838 CE.
As noted in the the article: “…though conquered