Khuzestan Central Persia Caucasus Pars Khorasan Other geographies The siege of Herat was part of the Islamic conquest of Persia which was commanded by Ahnaf ibn Qais.

However, parts of Khorasan were held by Sasanian loyalists helped by their Hephthalite allies.

[1] Later Ahnaf was sent by Abdullah to lead the vanguard of banu Tamim and 1000 Asawira through Quhistan.

The people of Tabasyin later revolted from the caliphate just to be reconquered by Ahnaf who now exacted heavier tool of tax.

However, the ruler of Herat along with the Karenids and many other natives of Khorasan, later rebelled against the Arabs, but were defeated at the battle of Badghis.