Inanch marched against Hamadan, in order to place his brother Muhammad on the throne in 3 August 1161 but Arslan and Eldigüz defeated him in battle, forcing Ïnanch to flee. Inanch again marched on Eldugizids in 1165, this time by aid of Bavandid ruler Hasan I (who also became Inanch's son-in-law) and Khwarazmshah Il-Arslan. Eldiguz managed Inanch's assassination in 1169 and capture of Rey, which was granted to Muhammad Jahan Pahlavan as an iqta.