The Instrument of Surrender (Bengali: আত্মসমর্পনের দলিল) was a written agreement that enabled the surrender of the Pakistan Armed Forces in the Bangladesh Liberation War. The surrender took place at the Ramna Race Course in Dacca on December 16, 1971. Lieutenant-General A A K Niazi, joint commander of the Pakistan Armed Forces in East Pakistan, and Lieutenant General Jagjit Singh Aurora, joint commander of the Bangladesh-India Allied Forces, signed the instrument amid thousands of cheering crowds at the race course. Air Commodore A. K. Khandker, Deputy Commander-in-Chief of the Bangladesh Armed Forces, and Lieutenant General J F R Jacob of the Indian Eastern Command, acted as witnesses to the surrender.
Subsequently, around 93,000 Pakistani troops and officials were taken as prisoners-of-war by the Indian Army, the largest number of POWs since World War II. They were later repatriated in 1973 under the terms of the Delhi Agreement.