On 25 March 1971, the Pakistani military, supported by the paramilitary units, launched the military operation to pacify the insurgent-held areas of East Pakistan, which led to a prolonged conflict with the Bengali Mukti Bahini. Although conventional in nature during March–May 1971, it soon turned into a guerrilla insurgency from June of that year. Indian Army had not directly supported the Bengali resistance but had launched Operation Jackpot to support the insurgency from May 1971.