KnowraSistanLinked fromLinked fromThe 5 pages that link to Sistan, each with the reason it gives.All 5Broader topic 3Narrower topic 2Saffarid dynastyNarrower topic: This borderland supplied the dynasty’s base and its early military following.Ya'qub ibn al-Layth al-SaffarNarrower topic: Its frontier towns and military networks formed the base of Ya'qub's ascent.