During the Bangladesh Liberation War, Pakistan Army created an "ad hoc" Rajshahi brigade, deployed in September. During the 1971 Bangladesh genocide by the Pakistan, in which Pakistani Army and its supporting militias (Razakar) killed estimated between 300,000 to 3,000,000 people and raped 200,000–400,000 Bangladeshi Hindu women in a systematic campaign of genocidal rape, Rajshahi witnessed great atrocities by the Pakistan army in the 1962 Rajshahi massacres of Bangladeshis and heroic struggles by the Bangladeshi freedom fighters. The largest mass grave in Bangladesh is located in University of Rajshahi, which was used as an army camp during the war. On the other hand, one of the great battles of the war took place near Rajshahi. Captain Mohiuddin Jahangir, who died in battle, was awarded the highest honour (Bir Shrestho) by the Bangladesh government after the war. Pakistan Army's 93,000 troops unconditionally surrendered to the Mukti Bahini (or "Bangladesh Forces") on 16 December 1971. This day and event is commemorated as the Bijoy Dibos () in Bangladesh.