History of the Anushilan Samiti
Around 1902, Aurobindo Ghosh arranged for Bannerjee to return to Calcutta to begin organisational work, where he began a gymnasium and a youth society. It was at this time that Bannerjee came in touch with Vibhuti Bhushan Bhattacharya, Sarala Devi Ghoshal and Pramathanath Mitra. In Calcutta, a few clubs and societies were still active at the time. Most notable was a gymnasium in Ballygunge Circular Road run by Sarala Devi herself, a second was an organisation named "Anushilan Samiti" founded by Satish Chandra Basu with the patronage of Pramathanath Mitra. A third one was a youth club called "Attōnnōti Samiti" (Self-improvement society) in central Calcutta.
History of the Anushilan Samiti
In 1923, another Anushilan-linked group, the Hindustan Republican Association was founded in Benares in the United Provinces by Sachindranath Sanyal and Jogesh Chandra Chatterjee, and was influential in radicalising north India, it soon had branches from Calcutta to Lahore. A series of successful dacoities in UP culminated in the train robbery in Kakori. However, the subsequent investigations and two trials broke the organization. Several years later it would be reborn as the Hindustan Socialist Republican Association.