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 February plot and a December 1915 plot were thwarted by British intelligence. Jatin and a number of fellow revolutionaries were killed in a firefight with police at Balasore, in present-day Orissa, which brought Jugantar to an end during the war. The Defence of India Act 1915 led to widespread arrests, internmens, deportations and executions of members of the revolutionary movement. By March 1916, widespread arrests helped Bengal police crush the Dacca Anushilan Samiti in Calcutta. Regulation III and the Defence of India Act were enforced throughout Bengal in August 1916. By June 1917, 705 people were under house arrest under the Act and 99 were imprisoned under Regulation III. In Bengal, revolutionary violence fell to 10 incidents in 1917. According to official lists, 186 revolutionaries were killed or convicted by 1918. After the war the Defence of India Act was extended by the Rowlatt Acts, the passage of which was a prime target of M. K. Gandhi’s non-cooperation movement. Many revolutionaries released after the war escaped to Burma to avoid repeated incarceration.