During the war of liberation a strong Pak army base was established at Birishiri in the missionary area of Durgapur under the leadership of Major Sultan of the Pak aggressor forces. Sitting here, the Pak army, with the help of notorious Bengali brokers, al-badrs and razakars, controlled the Durgapur Sadar, the border areas of Kalmakanda, Lengura, Nazirpur and Vijaypur in Durgapur. At the same time, freedom-loving people were brutally killed in the slaughterhouse of Birishiri in the dark of night.