Alavid Dynasty (864 To 928)
The Alavids or Alavians were a Shia emirate based in Mazandaran of Iran. They were descendants of the second Shi'a Imam (Imam Hasan ibn Ali) and brought Islam to the south Caspian Sea region of Iran. Their reign was ended when they were defeated by the Samanid empire in 928 AD. After their defeat some of the soldiers and generals of the Alavids joined the Samanid dynasty. Mardavij the son of Ziar was one of the generals that joined the Samanids. He later founded the Ziyarid dynasty. Ali, Hassan and Ahmad the sons of Buye (that were founders of the Buyid or Buwayhid dynasty) were also among generals of the Alavid dynasty who joined the Samanid army.
Read more about this topic: Military History Of Persia