Anushilan Samiti
Anushilan Samiti (Ōnūshīlōn sōmītī, "lit": body-building society) was a Bengali Indian organisation that existed in the first quarter of the twentieth century, and propounded revolutionary violence as the means for ending British rule in India. The organisation arose from a conglomeration of local youth groups and gyms ("Akhara") in Bengal in 1902. It had two prominent, if somewhat independent, arms in East and West Bengal identified as Dhaka Anushilan Samiti centred in Dhaka (modern day Bangladesh), and the Jugantar group (centred at Calcutta) respectively.
Biren Dutta
Dutta was born in Agartala in 1910, son of Jogneswar Dutta. He studied at Calcutta University. He was linked to the Anushilan Samiti revolutionary movement. He was arrested in 1933. Just before his arrest he had come into contact with the communist movement. Dutta was released from jail in May 1938, after which he travelled back to Tripura to build a branch of the Communist Party there. His work was conducted under supervision of the Comilla Divisional Committee of the Communist Party. Dutta and his associated founded the Janamangal Samiti ('People's Welfare Association') in 1938. Dutta served as assistant secretary of Janamangal Samiti and was the editor/publisher of its publication "Projar Katha".