Conflict erupts between newly arrived Berber troops from North Africa and the urban population of Córdoba, leading to the death of Caliph Hisham II and the sacking of Madinat al-Zahra. Anarchy reigns, and power is divided among Arab elites, Berber mercenaries, muwallads, and Slav converts to Islam, who served the caliph. The eminent surgeon, al-Zahrawi, dies. He authored a 30-volume work on medicine, which remained important in its Latin form for over five centuries.