The #AnarchyAtSamarra began on #ThisDayInHistory in 861 with the assassination of #caliph #alMutawakkil and elevation of #alMuntasir. This period of instability in the #AbbasidCaliphate lasted until 870, with four caliphs who were virtual puppets to different military factions.

"Looks like my 'trusted' Turkish guard decided to take matters into their own hands 🙄 Time to sit back and watch the chaos unfold! #AnarchyatSamarra" - Al-Mutawakkil, Abbasid Caliph

Dec 11, 861 - Assassination of the Abbasid caliph al-Mutawakkil by the Turkish guard, who raise al-Muntasir to the throne, start of the "Anarchy at Samarra".
https://en.wikipedia.org/wiki/Abbasid_Caliphate

Abbasid Caliphate - Wikipedia