6 dated entries naming Isma'ilism, drawn from 6 separate years between 813 CE and 1176 CE. Nothing here is written by us: each line is the sentence a Wikipedia year article used, and the link beside it opens the exact revision.
813Muhammad at-Taqi, Muslim ninth Ismā'īlī imam (or 814)source
839Muhammad at-Taqi, Muslim ninth Ismā'īlī imam (or 840)source
840Muhammad at-Taqi, Muslim 9th Ismā'īlī imam (or 839)source
11th century
1011The Baghdad Manifesto is ordered by Caliph Al-Qadir of the Abbasid Caliphate, in response to the growth of the Fatimid-supporting Ismaili sect of Islam within his borders.source
1095The Ismaili Shia split into the Musta'li and Nizari branch.source
12th century
1176Summer – Saladin ends his siege of the Ismaili ("Assassins") fortress of Masyaf, which is commanded by Rashid al-Din Sinan.source