Jugantar
Jugantar or Yugantar (যুগান্তর Jugantor; lit. New Era or Transition of an Epoch) was one of the two main secret revolutionary trends operating in Bengal for Indian independence. This association, like Anushilan Samiti, started in the guise of suburban fitness club. Several Jugantar members were arrested, hanged, or deported for life to the Cellular Jail in Andaman and many of them joined the Communist Consolidation in the Cellular Jail. The Jugantar party was established in April 1906 by leaders like Aurobindo Ghosh, his brother Barin Ghosh, Hemchandra Kanungo, Upen Banerjee . Along with 21 revolutionaries, they started to collect arms, explosives and manufactured bombs. The headquarters of Jugantar were located at 27 Kanai Dhar Lane then 41 Champatola 1st Lane in Kolkata. Some senior members of the group were sent abroad for political and military training. One of the first batches included Surendra Mohan Bose, Tarak Nath Das and Guran Ditt Kumar, who, since 1907, were extremely active among the Hindu and Sikh immigrants on the Western coast of North America. These units were to compose the future Ghadar Party. In Paris Hemchandra Kanungo alias Hem Das, along with Pandurang M. Bapat, obtained training in explosives from the Russian anarchist Nicholas Safranski. In 1908, as a next step, Jugantar chose to censure persons connected with the arrest and trial of revolutionaries involved in the Alipore Bomb Case. On 10 February 1909, Ashutosh Biswas, who conducted the prosecution of Kanai and Satyen for the murder of Naren Gosain (a revolutionary turned approver), was shot dead by Charu Basu in the Calcutta High Court premises. Samsul Alam, Deputy Superintendent of Police, who conducted the Alipore Case was shot and killed by Biren Dutta Gupta on the stairs of Calcutta High Court building on 24 January 1910. Charu Basu and Biren Dutta Gupta were later hanged. Several including Jatindra Nath Mukherjee were arrested in connection with the murder of Police inspector Samsul Alam on 24 January 1910 in Calcutta and other charges.