The Operation Jackpot was a codename for three operations undertaken by Indian Army and Bengali Mukti Bahini operating under the Eastern Command of the Indian Army in East-Pakistan against the Federation of Pakistanduring the climax of the Bangladesh Liberation War.

After Pakistan Army drove the Bengali resistance across the Indian border at the conclusion of Operation Searchlight, Indian Army implemented a supply and training operation for the Mukti Bahini from May 15, 1971, with the goal of sending ever increasing number of trained fighters to attack Pakistani forces and sabotage military and economic assets to demoralize the Pakistani soldiers and disrupt their supply network. This enterprise was dubbed "Operation Jackpot".

        The Mukti Bahini Naval Commandos launched several sabotage efforts in the cities of Chittagong, Chandpur, Mongla, and the Narayanganj District against the operating combined forces of the Pakistan Soldiers, Pakistan Marines, Pakistan Navy SEAL Teams, and the East Pakistan Security Forceson the night of 15 August 1971.Bengali Submariners who had defected from Pakistani submarine PNS Mangro (S133), then based in Toulon in France, led the attacks, and this is also known as Operation Jackpot.Pakistani military initiated countermeasures to improve security by increasing the door-to-door clearance and the applied counterinsurgency tactics by the Army Special Forces and the Navy SEAL Teams, but this failed to curb the Mukti Bahini activity.

         The third operation was the operational plan designed by Lt. Gen Sagat Singh, commander of the Indian Army IV Corps attached to the Eastern Command and the Bangladesh forces operating in his operational area against the Pakistani forces in Sylhet, Comilla and Chittagong as part of the overall campaign during November 21 - December 16, 1971

Refrences- google.com dhakatribune.com