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.
Anushilan Samiti
With war clouds gathering in Europe, Indian nationalists at home and abroad decided to use a war with Germany for the nationalist cause. Through Kishen Singh, the Bengal revolutionary cell was introduced to Har Dayal when Dayal visited India in 1908. Dayal was associated with India House, a revolutionary organisation in London then headed by V. D. Savarkar. By 1910, Dayal was working closely with Rash Behari Bose. Bose, a Jugantar member working at the Forest Institute at Dehra Dun, was engaged with the revolutionary movement in Uttar Pradesh and the Punjab since October 1910. After the decline of India House, Dayal moved to San Francisco after working briefly with the Paris Indian Society. In the United States, nationalism among Indian immigrants (particularly students and the working class) was gaining ground. Taraknath Das, who left Bengal for the United States in 1907, was among the Indian students who engaged in political work. In California, Dayal became a leading organiser of Indian nationalism amongst predominantly-Punjabi immigrant workers and was a key member of the Ghadar Party.