of the Zirid dynasty ruler Buluggin, accession of al-Mansur ibn Buluggin. 986: The Buwayhid Sultan Samsam al-Dawla overthrown by Sharaf al-Dawla. 989: Death of the Buwayhid Sultan Sharaf al-Dawla, accession of Baha al-Dawla. 991: Deposition of the Abbasid Caliph at-Ta'i, accession of al-Qadir. 996: Death of the Zirid dynasty ruler Mansur, accession of Badis ibn Mansur. 996: Death of the Fatimid Caliph Al-Aziz Billah, accession of Al-Hakim. 997: Death of the Samanid ruler Nuh II, accession of Mansur II. 998: Death of the Samanid ruler Mansur II, accession of 'Abd al-Malik II. Mahmud of Ghaznavid becomes the Amir of Ghazni. 999: Bughra Khan of Karahan Turks capture Bukhara. End of the Samanids. 999: By the end of this century, global Muslim population was estimated at 10 million. See also Timeline of Muslim history 10