They readied a large naval fleet in addition to their land-force, infantry and cavalry in the early morning and attacked the Mughal Fort of Chandrapratap.
[2]: 32–33 Jalair was then appointed to join the army alongside Shaykh Kamal and Tuqmaq Khan to Jahangirnagar, which they reached with great difficulty in six marches.
[6] Islam Khan I later ordered Jalair to go to the Mohana of the Kutharuiya (modern-day Kirtinasha, tributary of the Padma) bringing twenty war-boats with him.
When Islam Khan reached Kutharuiya in the last pahar of the night, he took the twenty boats with him through the Isamati aiming to capture Jatrapur, to which he successfully did.
[2]: 63–75 After the surrender of Musa Khan in 1609, the next target rebel of the Mughal Empire was Khwaja Usman of Bokainagar, who was the leader of the Afghans in Bengal.
After the construction of the nineteenth fort, Jalair and his contemporaries took a break with the approach of the Islamic month of Ramadan in which they would observe fasting.
[2]: 163 Under the chief command of Mukarram Khan, Jalair was also appointed to accompany the imperialists against Raja Parikshit of Koch Hajo in 1612.
[2]: 287 Due to this case, Qasim Khan ordered his bakhshi (paymaster), Khwaja Tahir Muhammad, to reinstate their titles and jagirs and to inform the imperial Court of this reformation.
At Bundasil, Sardar Mubariz of Sylhet decided to lead an expedition with Jalair to Pratapgarh which was under the domain of the Raja of Kachar.
They have said that during the reign of Timur in the late 12th century, the emperor had reached this extreme point and left a group of Mongols to protect the land before returning to his capital in Baghdad.
Members of this tribe were white-skinned, spoke a Sino-Tibetan language, ate all sorts of animals and vegetables, and wore large turbans and big brass earrings (tunkal).
Qasim Khan then sent these tribal people to the Emperor, who was pleased with the hard work of Jalair and his comrades and raised their ranks and wages.
However, after learning that Jalair had fled from his appointed tribal territory which had recently been conquered with a lot of difficulty, Qasim was unimpressed at what he viewed as "cowardice".