Political history of Sri Aurobindo
Anushilan Samiti was founded as an attempt to organize Bengali youth through a program of physical fitness and spiritual training for a nationalist program. By 1902, Calcutta had three societies working under the umbrella of Anushilan Samity, a society earlier founded by a Calcutta barrister by the name of Pramatha Mitra. These included Mitra's own group, another led by a Bengali lady by the name of Sarala Devi, and a third one led by Aurobindo Ghosh. The Anushilan Samiti had Aurobindo and Deshabandhu Chittaranjan Das as the vice-presidents, Suren Tagore the treasurer. Jatindra Nath Banerjee (Niralamba Swami), Bagha Jatin, Bhupendra Nath Datta (Swami Vivekananda's brother), Barindra Ghosh were among other initial leaders.
By 1905, the work of Aurobindo and his brother Barin Ghosh allowed Anushilan Samity to spread through Bengal.
Anushilan Samiti
The activities of the "Samiti" around the time of World War I, along with the threat of Ghadarite uprising in Punjab, led to the passage of the Defence of India Act in 1915. At the time of its enactment, act received universal support from Indian non-officiating members in the Governor General's council, from moderate leaders within Indian Political Movement. The British war effort had received popular support within India and the act received support on the understanding that the measures enacted were necessary in the war-situation. Its application saw a significant curtailment in revolutionary violence in India. However, the wide scope and widespread use amongst general population and against even moderate leaders led to growing revulsion within Indian population.