Editing 900 (section)

==== [[Abbasid Caliphate]] ====
* Spring &ndash; Forces under the Transoxianian emir [[Isma'il ibn Ahmad]] are victorious at [[Balkh]] (Northern [[Afghanistan]]) over [[Amr ibn al-Layth]]; the latter is captured and sent to Caliph [[Al-Mu'tadid]] in [[Baghdad]].<ref>{{cite book|author=Par Ṭabarī (translated by Franz Rosenthal) |url=https://books.google.com/books?id=GcKhwo8SmlMC&pg=PA84 |title=The return of the Caliphate to Baghdad |publisher=SUNY Press |year=1985|isbn=978-0-87395-876-9}}</ref> The [[Samanid dynasty|Samanid Dynasty]] rules over [[Greater Khorasan|Khorasan]], as well as [[Transoxiana]].<ref name="Grousset">{{cite book|url= http://classiques.uqac.ca/classiques/grousset_rene/empire_des_steppes/grousset_steppes.pdf |archive-url=https://ghostarchive.org/archive/20221009/http://classiques.uqac.ca/classiques/grousset_rene/empire_des_steppes/grousset_steppes.pdf |archive-date=2022-10-09 |url-status=live|title=L'empire des steppes, Attila, Gengis-Khan, Tamerlan|author=René Grousset (1885-1952)|publisher=Payot |location=Paris|edition=4|year=1965|orig-year=1938}}</ref> A few months later, the Samanids conquer the [[Zaydid]] emirate of [[Tabaristan]]. This victory marks the beginning of the dispersion of the local [[Shi'ites]] by the new [[Sunni]] power.
* [[Arab–Byzantine wars]]: Emperor [[Leo VI the Wise|Leo VI]] ("the Wise") begins an offensive against the Abbasid army in [[Cilicia]], [[Upper Mesopotamia]] and [[Medieval Armenia|Armenia]]. He also continues the war against the Muslims in [[Sicily]] and [[southern Italy]].<ref name="Bréhier">{{cite book|url=http://classiques.uqac.ca/classiques/brehier_louis/monde_byzantin/brehier_vie_et_mort_byzance.pdf |archive-url=https://ghostarchive.org/archive/20221009/http://classiques.uqac.ca/classiques/brehier_louis/monde_byzantin/brehier_vie_et_mort_byzance.pdf |archive-date=2022-10-09 |url-status=live|author=Louis Bréhier|title=Vie et mort de Byzance|publisher=Albin Michel|location=Paris |year=1946|page=596}}</ref>
* The future founder of the [[Fatimid Caliphate]], [[Abdallah al-Mahdi]] and his family migrate to [[North Africa]]. They claim to be descendants of [[Fatimah]], the daughter of the Islamic prophet [[Muhammad]].
* The [[Qarmatians]] of [[Bahrain (historical region)|al-Bahrayn]], under [[Abu Sa'id al-Jannabi]], score a major victory over the Abbasid army led by [[al-Abbas ibn Amr al-Ghanawi]].