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.
Howrah-Sibpur Conspiracy case
The Howrah-Sibpur Conspiracy case refers to the arrest and trials of 47 Bengali Indian nationalists of the "Anushilan Samiti" that followed in the wake of the murder of Inspector Shamsul Alam on 24 January 1910 in Calcutta. Alam was Deouty superindtendent and intelligence officer in Bengal Police investigating the murder of Naren Gosain, crown-witness in the Alipore bomb case, and other murders including those of Ashutosh Biswas, advocate of Calcutta High Court in charge of prosecution of Gossain murder case, and of Naren Bannerjee, the police officer who arrested Khudiram Bose. Alam had uncovered the underlying Bengali revolutionary network of the "Anushilan Samiti" that linked the murders and other robberies in this time, and at the time of his own murder in the hands of Biren Dutta Gupta, Alam was preparing to consolidate the charges to bring them all to trial in a single case.