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.
Panchanan Chakraborty
At this juncture, inside the prison, Panchanan Chakraborty Chakraborty was among those who encouraged the under-trial State prisoners of the Jugantar and the Anushilan Samiti to stop amusing the Police with their internecine animosity and come to terms. Thus united, they maintained their collaboration with Gandhi’s movement, deciding, however, to stick to their initially radical ethics : Bhupendra Kumar Datta took charge of the Jugantar workers and Rabindramohan Sen those of the Anushilan. Soon, shunning the political stunts of the elderly leaders, dissident factions from both these parties united together as the Revolt Group, otherwise baptised by the Police as the New (or Advanced) Violence Party under younger revolutionaries like the Chittagong-famous Ananta Singh, Ganesh Ghosh and Panchanan Chakraborty.