1. Iwaz Khalji's regime has been described as "constructive" as Khalji made major developments to Bengal by innovating flood defence systems and interlinking major cities by means of constructing South Asia's earliest-recorded embankments and extending the Grand Trunk Road.
Iwaz Khalji was responsible for establishing Bengal's first naval force, the complete fortification of Lakhnauti and the founding of the fort-town of Basankot.
Iwaz Khalji was member of the Khalaj tribe, a tribe of Turkic origin that settled in Afghanistan.
Iwaz Khalji was born into a Muslim family in Garmsir, and his father's name was Husayn Khalji.
Iwaz Khalji became a deputy during Bakhtiyar Khalji's advances towards Bihar and Bengal, and in recognition of his contribution, was made the Jagirdar of Kangori in North Bengal.
Iwaz governed Bengal for two years until Ali Mardan Khalji returned to Bengal in 1210, in which he freely gave up his governorship of Bengal to the latter.
Iwaz Khalji undid Ali Mardan's exiles of nobles by inviting them back to Bengal.
Iwaz Khalji transferred the capital from Devkot to Lakhnauti, which he newly rebuilt and completely fortified in all four directions.
Opposite of his new capital, Iwaz Khalji established a fort-town named Basankot.
Iwaz Khalji became the first to develop a powerful navy and flotilla for Bengal and built several dykes with arched bridges after analysing the vastness of the Bengal delta and its vulnerability to floods.
Iwaz Khalji had the Friday khutbahs read in his own name and invoked the name of the Commander of the Faithful in his coins, to enhance his position in the eyes of the locals and equate his status with that of the Delhi's sultan.
Iwaz Khalji had appointed his son and heir, Ali Sher Iwaz Khalji, as the governor of Birbhum and northwestern Bengal.
Iwaz Khalji arranged for the arrival of Muslim preachers from Central Asia, such as Jalaluddin bin Jamaluddin Ghaznavi, to come to Bengal and give lectures in his court.
Iwaz Khalji carried out invasions into Vanga, Tirhut and Utkala; making them his tributary states.
Iwaz Khalji hurried back to Lakhnauti where the two forces came into conflict where he was killed and succeeded by Nasiruddin Mahmud.