The mid-16th century witnessed the dramatic disintegration of the Bengal Sultanate, caught in the imperial crossfire between the Sur Empire of Sher Shah and the resurgent Mughal dynasty of Akbar. When imperial Mughal armies marched into Bengal in 1576, annexing the province following the Battle of Rajmahal, they encountered a formidable obstacle that halted their advance for nearly four decades: the Baro-Bhuiyans (The Twelve Chieftains). Led by the indomitable Isa Khan of Sonargaon, this loose confederation of native Muslim and Hindu zamindars utilized deltaic naval warfare to repeatedly defeat Akbar’s grandest generals, until Subahdar Islam Khan Chishti finally pacified the province, establishing Dhaka as the provincial capital in 1610.
1. The Sur Interlude and Fall of the Sultanate (1538–1576)
In 1538, the legendary Afghan military genius Sher Shah Suri overthrew Sultan Ghiyasuddin Mahmud Shah, incorporating Bengal into his Pan-Indian empire. Sher Shah recognized Bengal’s immense agricultural and manufacturing wealth, transforming its infrastructure by extending the Sharak-e-Azam (Grand Trunk Road) from Sonargaon on the Meghna all the way to Attock on the Indus river, establishing horse postal relay stations (*Dak Chowkis*) and standardized currency.
Following the collapse of the Sur dynasty, the Afghan Karrani Sultanate maintained fragile independence in Bengal under Sulaiman Khan Karrani. However, when his impetuous son Daud Khan Karrani openly challenged Emperor Akbar by striking his own coins and declaring sovereignty, Akbar dispatched his prime minister Munim Khan and a massive imperial army. In July 1576, at the decisive Battle of Rajmahal, Daud Khan was captured and executed. Bengal was formally declared the nineteenth Subah (province) of the Mughal Empire—yet the Mughals held only fortified garrisons; the vast deltaic countryside belonged to the Bhuiyans.
2. Isa Khan and the Baro-Bhuiyan Resistance
The geography of eastern Bengal (known as Bhati, the low-lying river country) was virtually impassable to imperial heavy cavalry during the annual six-month monsoons. Capitalizing on this aquatic terrain, a confederation of twelve powerful chieftains known as the Baro-Bhuiyans mounted fierce resistance against Mughal annexation. Foremost among them was Isa Khan Masnad-i-Ala, ruler of Sonargaon, Bhati, and the surrounding river basins.
The Mughal court historian Abu’l-Fazl documented Isa Khan’s extraordinary naval power in the official imperial chronicle Akbarnama:
“Isa Khan, the great zamindar of Bhati, subdued all the chiefs of the country around him… He had numerous war boats (Nawwara), and by their means, he defended his territories against the imperial forces. The Mughal troops, accustomed to fighting on dry ground with cavalry, could effect little amid the countless streams, swamps, and flooded plains of Bhati.”
— Abu’l-Fazl, Akbarnama (c. 1598 CE)
When Akbar dispatched his greatest military commander, Raja Man Singh of Amber, as Subahdar of Bengal, Isa Khan outmaneuvered the imperial troops in multiple engagements. In September 1597, at the naval battle of the Meghna near Vikrampur, Isa Khan and his ally Masum Khan Kabuli ambushed and destroyed the imperial flotilla; Man Singh’s son, Durjan Singh, was slain, and the imperial army was driven back. A warrior of legendary chivalry, Isa Khan is recorded in local folklore as having spared Man Singh’s life during personal single combat, forging a temporary truce that preserved Bengal’s autonomy until Isa Khan’s death in 1599.
3. Subahdar Islam Khan Chishti and the Founding of Dhaka (1610 CE)
The definitive subjugation of the Bhuiyans was accomplished by Akbar’s successor, Emperor Jahangir, who appointed the astute and relentless Islam Khan Chishti as Subahdar of Bengal in 1608. Islam Khan understood that Bengal could never be conquered on horseback; it required an overwhelming imperial river navy (the *Mughal Nawwara*).
Mobilizing hundreds of armed war vessels—including heavy gunboats (*Ghurabs*), swift rowed gun-canoes (*Kosas*), and floating fortresses—Islam Khan systematically advanced through the rivers, defeating the confederates one by one: Musa Khan (son of Isa Khan), Raja Pratapaditya of Jessore, and Kedar Roy of Sripur.
To orchestrate this amphibious campaign and defend against Portuguese and Arakanese pirate raids, Islam Khan transferred the provincial capital in 1610 from Rajmahal in the west to a strategically central river port on the Buriganga River: Dhaka. Rechristened Jahangirnagar in honor of the reigning Emperor, Dhaka became the political, administrative, and economic epicenter of eastern India, laying the urban foundation of modern Bangladesh.
Primary Academic References
- Abu’l-Fazl. (1598). Akbarnama (Trans. H. Beveridge, 1907). Asiatic Society of Bengal.
- Mirza Nathan. (1630). Baharistan-i-Ghaybi: A History of the Mughal Wars in Assam, Bengal, and Orissa (Trans. M. I. Borah, 1936). Government of Assam.
- Karim, A. (1992). History of Bengal: Mughal Period (Volume I). Institute of Bangladesh Studies, Rajshahi University.
- Sarkar, J. N. (1948). The History of Bengal: Volume II — Muslim Period. University of Dacca.
