He was the advisor and commander of the Javanshir armies in the 8th century [Prince Juansher of Kakheti - r.786-807] in the first wars against the dynasty of the Bani Abbas (Caliphat of the Abbasids). On the death of Javanshir (807) he took his place as leader of Azarbaijan and married the widow of Javanshir. (ref. www.azerturk.50megs.com / figures-azerbaijan.blogfa.com)

He was executed by the Caliph Muhammad al-Mu'tasim Caliph al-Mu'tasim, son of Harun al-Rashid.

The Khorramdin or Khurramite Movement was a socio-religious and political movement which originated in the 8th century AD. Its birth was the result of public discontent in Iran following Abu Muslim's execution in 755. The movement was actually founded by Sunpadh, a close associate of Abu Muslim.

Under the leadership of Babak, the Khurammites proclaimed the breakup and redistribution of all the great estates and the abolition of Islam. In 816 they began making attacks on Muslim forces in Iran and Iraq. The Abbasid Caliph Al-Mamun sent four armies to deal with the problem, but they were defeated each time with Byzantine support.The sect continued to attract followers until the sixteenth century when the Safavids took control of Iran.

Babak Khorramdin was one of the main leaders of the Khorramdin Movement. He was born in around 795 near the modern-day Ardabil in the Azerbaijan province of Northern Iran. He was a neo-Mazdakite. According to Waqed, Babak's father was a Persian from Madā'īn (formerly known as Ctesiphon, former capital of Sassanian Persian Empire. At the age of 18, Babak's father passed away and the young Khorramdin had to take charge of his family. He established himself in the city of Tabriz and traded in arms for a short while before plunging into the liberation movement.

Babak was adopted and mentored by one Shahrak who was a leader of the Khorramdin Movement. Soon Babak took over from Shahrak and lead the movement from 816 to 837. Babak earned huge support from Persians all over Isfahan, Azarbaijan, Ray, Hamadan, Armenia, Gorgan and the rest of Persia. In 836, Babak routed the forces of Bugha Al Kabir, a military officer of the Caliphate.

In 837-838 Al Mu'tasim, the Abbasid Caliph sent Afshin with clear military instructions to capture Babak. Afshin successfully captured Babak's stronghold of Badhdh. Babak sought refuge with the Armenian leader Sunbat. However, he was betrayed by Sunbat and handed over to the forces of the Caliphate. Babak was eventually executed. During Babak’s execution, the Caliph's henchmen first cut off his legs and hands in order to convey the most devastating message to his followers. The legend says that Babak bravely rinsed his face with the drained blood pouring out of his cuts, thus depriving the Caliph and the rest of the Abbasid army from seeing his pale face, a result of the heavy loss of blood (https://en.wikibooks.org/wiki/Iranian_History/Last_Remnants_of_Sass...)

http://www.iranicaonline.org/articles/babak-korrami
BĀBAK ḴORRAMĪ (d. Ṣafar, 223/January, 838), leader of the Ḵorramdīnī or Ḵorramī uprising in Azerbaijan in the early 3rd/9th century which engaged the forces of the caliph for twenty years before it was crushed in 222/837.

According to Wāqed, however, ʿAbd-Allāh, Bābak’s father, was a cooking-oil vendor who had left his home town Madāʾen for the Azerbaijan frontier zone and settled in the village of Belālābād in the Maymaḏ district. His mother, according to Faṣīḥ (I, p. 283), was a one-eyed woman named Māhrū from a village in a district belonging to Azerbaijan. On the one hand the stories about ʿAbd-Allāh and Maṭar may imply that Bābak’s father had an illicit relationship with this woman, but on the other hand Dīnavarī (p. 397) asserts: “What seems to us to be true and proven is that Bābak was a son of Moṭahhar, the son of Abū Moslem’s daughter Fāṭema, and that the Fāṭemīya group of the Ḵorramīs took their name from this Fāṭema, not from Fāṭema the daughter of God’s Prophet.” In Masʿūdī’s Morūj (ed. Pellat, IV, p. 144, sec. 2398) Bābak is described simply as one of the Fāṭemīya group of the Ḵorramīs.

Il est le conseiller et le commandant des armees de Javanshir au 8eme siecle[ Prince Juansher of Kakheti - r.786-807 ] dans les premieres guerres contre la dynastie des Bani Abbas (caliphat des Abbasides) . A la mort de Javanshir (807) il prend sa place comme leader d'Azarbaijan et epouse la veuve de Javanshir. (ref. www.azerturk.50megs.com / figures-azerbaijan.blogfa.com)

Il fut execute par le caliphe Muhammad al-Mu'tasim Caliph al-Mu'tasim , fils de Harun al-Rashid.