Editing 838 (section)

==== Abbasid Caliphate ====
* January &ndash; [[Babak Khorramdin]], an Iranian military leader, is brutally executed by order of al-Mu'tasim.<ref>''The Golden Age of Islam'' by Maurice Lombard, p. 152. {{ISBN|1-55876-322-8}}.</ref>
* A conspiracy is discovered, led by General [[Ujayf ibn Anbasa]], to assassinate al-Mu'tasim while he is campaigning, and place his nephew [[Al-Abbas ibn al-Ma'mun]] on the throne. A widespread purge of the army follows, which cements the leading role of the [[Turkic peoples|Turkish]] slave-soldiers (''[[ghilman]]'') in the Abbasid military establishment. Ujayf is executed and Al-Abbas put in prison, where he dies.
* The [[Yazidis]] rise up against the Abbasids (approximate date).<ref>M. Th. Houtsma, 1993, E. J. Brill's First Encyclopaedia of Islam, 1913-1936: Volume 4 - p. 1136, Brill.</ref>