Yuzbak was appointed Governor of Bengal after Masud Jani was unable to defeat the forces delegated by Emperor Narasingha Deva I of Eastern Ganga for four years.
In 1254, he invaded the Azmardan Raj (present-day Ajmiriganj) in northeast Bengal and managed to defeat the local Raja.
Following the recapture of Mandaran and southwestern Bengal, he signed a treaty of alliance with Narasingha and declared himself independent of the Delhi Sultanate.
[3] Following the execution, Yuzbak's domain was split into two with Narasimhadeva I of Eastern Ganga breaking the alliance and taking over the areas he had lost.
Yuzbak's fellow tribesman, Ijjauddin Balban Iuzbaki, succeeded him as Governor of Bengal for the Delhi Sultanate.