9 dated entries naming Shia, drawn from 9 separate years between 600 CE and 1957 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.
600Ali ibn Abi Talib, Muslim caliph and Shī‘ah imām (approximate date)source
7th century
632March 18 (approximate) – Muhammad makes his final sermon to the Muslims. It is believed by Shia to be the appointment of Ali ibn Abi Talib as his successor. The Imamah (Shia doctrine) of Ali Ibn Abi Talib, for the religious, spiritual and political leadership of the Ummah, begins.source
700Ja'far al-Sadiq, Shī‘ah Imām and scholar (or 702)source
8th century
702Ja'far al-Sadiq, sixth Shī‘ah Imām and Muslim scholar (d. 765)source
719Isma'il ibn Jafar, Shī‘ah Imām and scholar (or 722)source
722Isma'il ibn Ja'far, Shī‘ah Imām and scholar (or 719)source
775Isma'il ibn Jafar, Shī‘ah Imām (approximate date)source
12th century
1138June 6 – Al-Rashid Billah (deposed caliph of Baghdad), having fled to Isfahan, is killed there by a team of four Nizari Ismailis (Assassins). This is celebrated in Alamut for a week by Shias.source
20th century
1957July 11 – His Highness Prince Karim Aga Khan IV becomes the 49th Imam of the Shia Ismaili Muslims at age 20. His grandfather Sir Sultan Mohammed Shah Aga Khan III appoints Prince Karim in his will.source