Tahirid dynasty
The Saffarids used their capital Zaranj as a base for an aggressive expansion eastward and westward. They first invaded the areas south of the Hindu Kush, and then overthrew the Persian Tahirid dynasty, annexing Khorasan in 873. By the time of Ya'qub's death, he had conquered the Kabul Valley, Sindh, Tocharistan, Makran (Balochistan), Kerman, Fars, Khorasan, and nearly reached Baghdad but then suffered a defeat by the Abbasids.