Ifriqiya is the area during medieval history comprising of the eastern part of the Constantinois (modern eastern Algeria), Tunis (modern Tunisia), and Tripolitania (modern western Libya). This area was part of what had previously been included in the Africa Province of the Roman Empire.
Bjorn, Halfdan, and Sinric are brought to Kairouan, Ifriqiya by Commander Euphemius and Kassia to meet Emir Ziyadat Allah. Ziyadat Allah is the Emir of Ifriqiya. Ifriqiya is ruled by the Aghlabids Dynasty, an Arab dynasty of Emirs from the Najdi tribe of Banu Tamim. They also ruled parts of Southern Italy, including Sicily, nominally on behalf of the Abbasid Caliph, for about a century.