He heavily contributed to the Seljuk conquest of Persia, even capturing the throne city of Rey, which is now a part of modern day Tehran.
A highlight of his military career can be that[2] Ibrahim Yinal commanded a successful raid against the eastern provinces of the Byzantine Empire which culminated in the Battle of Kapetron in September 1048.
[3] In 1058, for various reasons, including believing that he wasn't appropriately acknowledged for his contributions to the empire, and not being named the heir to the throne, he revolted against Sultan Tugrul.
In some sources, it is stated that the battle was fought in the vicinity of Rey and the troops under the command of Alp Arslan, Yakuti and Kavurd defeated and captured Ibrahim Yinal.
[4][5][6] After Ibrahim Yinal's defeat, he was personally strangled by Tughril with his bowstring at Baghdad,[7] though some sources say this was in the Seljuk throne city of Rey which is part of modern day Tehran.