On July 11, 1608, the Mughal fleet entered the River Ichhamati near Dakchara in Dhaka district, while Islam Khan advanced slowly toward the city, combating rebellious zamindars along the way.

On Islam Khan's orders, Mirza Nathan and Raja Satrajit, the ruler of Bhusna who had submitted to Mughal authority, conducted a khedda operation in Nazirpur to capture elephants for military use.

[5] The Ahom Kingdom in Assam, undergoing territorial expansion, inevitably clashed with the Mughals over the Assam-Bengal boundary, which extended across regions such as North Bengal, Bhutan, Sikkim, and Cooch Behar.

The Ahom realm was divided by the Brahmaputra River (Tsangpo in Tibet) into two regions: Uttarkul to the north and Dakhinkul to the south, with the capital located at Kuhhata (modern-day Guwahati).

[6] The Ahom forces advanced from Hanan to Satgaon and defeated the Kacharis at Dharamtika, capturing numerous weapons, including guns, swords, and spears.

[5][7] In October, Pratap Singh launched another campaign into the Dhansiri Valley, fortifying Demalai and stationing a strong garrison under Sunder Gohain at Raha.

[5][7] During this period, regional powers such as Raja Parikshit of the Eastern Koch Kingdom and the Mughal subadar of Bengal also played significant roles in shaping the political landscape.

Raja Parikshit, who maintained friendly ties with the Ahoms, continued the policy of peaceful relations initiated by his father, Raghu Dev.

Sukhampha, the aging Ahom ruler, focused on securing his frontiers possibly providing assistance to Raghu Dev in his resistance against adversaries on the western and southern borders.

Despite fierce resistance from the Mughal garrison, commanded by Mirza Yusuf Barlas, the defenders eventually ran out of gunpowder and lead, weakening their position.

[10][11] Satrajit, the son of a zamindar near Dhaka who had previously fought against Raja Parikshit, and an ally of the Mughals, also joined the expedition, with promises of being appointed Thanadar of Pandu and Guwahati.

[9] King Pratap Singha celebrated the victory with a triumphant return to the capital, where he performed the Rikkhvan ceremony, marking the culmination of the Ahom triumph.