On The March 25 , The Pakistan Army launched a terror campaign calculated to intimidate the Bengali's into submission . Within hours a wholesale slaughter had commenced in Dhaka , with the heaviest attacks concentrated on the University of Dhaka and the Hindu area of the old town . Bangladeshis remember the date as a day of infamy and liberation . The Pakistan Army came with hit lists and systematically killed several hundred Bengali's . Shak Mujibur Rahaman was captured and flown to West Pakistan for incarceration .