This man's death came at the hands of Yussuf Kothual, who managed to stab him in a desperate final attempt because this man, a legendary archer, lost his footing as he was about to kill Yussuf.  
This man's death came at the hands of Yussuf Kothual, who managed to stab him in a desperate final attempt because this man, a legendary archer, lost his footing as he was about to kill Yussuf.  That demise came as he was about to cross the Oxus River to conquer Turkestan.  He came to power after the death of his uncle Togrul, which started a bitter war of succession with another of his uncles, Kutalmish.  Much of his domestic policy and the consolidation of his empire was carried out by his advisor, (*) Nizam-ul-Mulk.  His campaigns against the Byzantine Empire started with his sack of Caesarea Mazaca but were initially met with defeat in Cilicia.  He emerged victorious, however, in a battle the following year, mostly due to the defection of Cuman mercenaries.  For 10 points, name this Seljuk ruler who defeated Romanos IV Diogenes at the Battle of Manzikert.
This man's death came at the hands of Yussuf Kothual, who managed to stab him in a desperate final attempt because this man, a legendary archer, lost his footing as he was about to kill Yussuf.  
{Alp Arslan}