Anushilan Samiti
By 1902, Calcutta had three secret societies working toward the violent overthrow of British rule in India. One was founded by Calcutta student Satish Chandra Basu with the patronage of Calcutta barrister Pramatha Mitra, another was led by Bengali woman Sarala Devi and the third was founded by Aurobindo Ghosh. Ghosh was one of the strongest proponents of militant Indian nationalism at the time. By 1905 the work of Aurobindo and his brother, Barin, enabled Anushilan Samity to spread throughout Bengal. Nationalist writings and publications by Aurobindo and Barin, including "Bande Mataram" and "Jugantar", had a widespread influence on Bengal youth. The 1905 partition of Bengal stimulated radical nationalist sentiments in Bengal's Bhadralok community, helping Anushilan acquire a support base of educated, politically-conscious and disaffected members of local youth societies. Its program emphasized physical training, training its recruits with daggers and "lathis" (bamboo staffs used as weapons). The Dhaka branch of Anushilan was led by Pulin Behari Das, and branches spread throughout East Bengal and Assam. More than 500 branches were opened in eastern Bengal and Assam, linked by "close and detailed organization" to Pulin's headquarters at Dhaka. It absorbed smaller groups in the province, soon overshadowing its parent organisation in Calcutta. Branches of Dhaka Anushilan emerged in Jessore, Khulna, Faridpur, Rajnagar, Rajendrapur, Mohanpur, Barvali and Bakarganj. Estimates of Dhaka Anushilan Samiti's reach indicate a membership of 15,000 to 20,000. Within two years, Dhaka Anushilan devolved its aims from the Swadeshi to that of political terrorism.
Tarak Nath Das
Tarak was born at Majupara, near Kanchrapara, in the 24 Parganas district of West Bengal. Coming from a lower-middle-class family, his father Kalimohan was a clerk at the Central Telegraph Office in Calcutta. Noticing the flair of this brilliant student with the pen, his headmaster encouraged him to appear in an essay contest on the theme of patriotism. Impressed by the quality of the paper by a school boy of sixteen years, one of the judges, the Barrister P. Mitter, founder of the Anushilan Samiti, asked his associate Satish Chandra Basu to recruit the boy. On passing his Entrance Examination with very high marks, in 1901, Tarak went to Calcutta and got himself admitted to the well-known General Assembly's Institution (now Scottish Church College) for university studies. In his secret patriotic activity, he found full support from his elder sister Girija.