Nimruz in the context of "Farah Province"

The Sasanian civil war of 628–632, also known as the Sasanian Interregnum was a conflict that broke out after the execution of the Sasanian king Khosrow II between the nobles of different factions, notably the Parthian (Pahlav) faction, the Persian (Parsig) faction, the Nimruzi faction, and the faction of general Shahrbaraz. Rapid turnover of rulers and increasing provincial landholder power further diminished the empire. Over a period of four years and fourteen successive kings, the Sasanian Empire weakened considerably, and the power of the central authority passed into the hands of its generals, contributing to its fall.

The Mihrabanid dynasty (Persian: خاندان مهربانیان) was a Persian Muslim dynasty that ruled Sistan (or Nimruz) from 1236 until the mid-16th century. It was the third indigenous Muslim dynasty of Sistan, having been preceded by the Saffarid and Nasrid dynasties.

The Nasrid dynasty, also referred to as the Later Saffarids of Seistan or the Maliks of Nimruz, was an Iranian Sunni dynasty that ruled Sistan in the power vacuum left by the collapse of the Ghaznavid Empire and until the Mongol invasion of Central Asia. The Nasrids were a branch of the Saffarid dynasty, and the establishment of the Nasrid Kingdom at Nimruz in 1068 until its dissolution in 1225 represents a transient resurgence of Saffarid rule in Sistan.

The kingdom was established by Tadj al-Din I Abu l-Fadl Nasr who was the Malik of Sistan under the Ghaznavids. Nasrid maliks ruled intermittently as sovereigns or vassals of larger neighboring powers, including the Seljuks, the Ghurids, and the Khwarezmians. After the dissolution of the kingdom by Inaltigin Khwarazmi in the wake of the Mongol invasion, the region was ruled by a third dynasty of Saffarids, the Mihrabanids.