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.
History of the Anushilan Samiti
In 1914 Rash Behari Bose, along with the Maharashtrian Vishnu Ganesh Pinglay and some Sikh militants, planned simultaneous troop risings in different places in February 1915. In the meantime, in Bengal the activity of "Anushilan" and "Jantar" launched what has been described by some historians as "...a reign of terror in both the cities and the countryside..." that "...came close to achieving their key goal of paralysing the administration...". A general atmosphere of fear encompassed the police and the law courts, severely affecting the moral. In entire 1915, only six revolutionaries were successfully brought to trial.
However both the February plot and a subsequent plot for December 1915 were thwarted by British intelligence. Jatin Mukhejee along with a number of fellow-revolutionaries were killed in a firefight with Policeforces at Balasore, in present-day Orissa. This effectively brough "Jugantar" to an end during the war. The passage of the Defence of India Act 1915 led to widespread arrest, internment, deportation and execution of members of the revolutionary movement. By March 1916 widespread arrests helped Bengal Police crush the "Dacca Anushilan Samiti" in Calcutta. Regulation III and Defence of India act was applied to Bengal from August 1916 on a widescale. By June 1917, 705 were under home-arrest under the act, along with 99 imprisonments under Regulation III. In Bengal Revolutionary violence in Bengal plummeted in 1917. After the war these powers were extended by the so-called Rowlatt Acts, the passage of which was one of the goads that led to the launching of M. K. Gandhi’s Non-Co-operation Movement.