A half-century of Samanid's Ruling over Qazvin city

Samanid had control of Qazvin since 287 A.H. until the last attempt to recapture Qazvin in 335 A.H. They wanted to have control of this region for three purposes:1- As a pretext for confronting the Alawites' forces; 2- to support Caliph Abbasid in suppressing the oppositions 3- the military ability of Ismail Samani. because of the internal vulnerability of the government, it was only possible to strengthen the Daylamites to keep Qazvin under control. In the beginning, they consolidated the Samanids' power in the west of Khorasan and it was satisfying for the Abbasids. But after a short while, they became political-military Samanid's contenders as Ziyarids and Buyids. The coincidence between the Daylamites power and the weakness of the Samanids led to the fall of Qazvin and some other central parts of Iran.  Samanids never recaptured Qazvin until 395 A.H. In this paper we will investigate A half-century of Samanid's Ruling over Qazvin city during which Samanid governed Qazvin democratically.