Lieutenant General Amir Abdullah Khan Niazi of Pakistan signed two copies of the Instrument of Surrender at 4:31 PM local time. The ceremony took place at the Ramna Race Course in Dhaka, under the gaze of Indian Lieutenant General Jagjit Singh Aurora. The document, typed on a simple sheet of paper, consisted of fourteen short paragraphs. It required the immediate ceasefire of all Pakistani forces in East Pakistan and their subsequent surrender. The signing lasted less than ten minutes.
The event was the direct result of a thirteen-day war between India and Pakistan, which itself capped a nine-month genocide and liberation struggle in East Pakistan. The Pakistani military campaign, Operation Searchlight, had begun in March 1971, aiming to crush Bengali nationalist aspirations. It created nearly ten million refugees. India's military intervention in December proved decisive. Niazi's surrender meant the immediate transfer of over 93,000 Pakistani military and civilian personnel into Indian custody as prisoners of war.
Many assume the war was solely an Indo-Pakistani conflict. The central force was the Mukti Bahini, the Bengali guerrilla resistance, which had waged a relentless campaign since spring. The Indian Army's final push was, in effect, a combined operation with these local forces. The new nation of Bangladesh was born not from Indian benevolence but from a partnered military victory.
The surrender created the world's eighth-most populous nation and permanently altered South Asia's geopolitics. It humiliated Pakistan, cutting its population in half and shattering the ideological foundation of the two-nation theory. India emerged as the region's dominant power. December 16 is commemorated as Victory Day in Bangladesh and Vijay Diwas in India, a rare instance of a single military conclusion defining the national calendars of two countries.