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.
Emperor vs Aurobindo Ghosh and others
In the aftermath of the Manicktala conspiracy, the western Anushilan Samiti found a more-prominent leader in Bagha Jatin and emerged as the Jugantar. Jatin revitalised links between the central organisation in Calcutta and its branches in Bengal, Bihar, Orissa and Uttar Pradesh, establishing hideouts in the Sunderbans for members who had gone underground. The group slowly reorganised, aided by Amarendra Chatterjee, Naren Bhattacharya and other younger leaders. Some of its younger members, including Taraknath Das, left India. Between 1909 and 1914, the group continued its campaign against the interests, making a number of attempts on the lives of Raj officials with variable successes. In a concerted attempt of revenge, Ashutosh Biswas, an advocate of Calcutta High Court in charge of the prosecution of the Gossain murder case, was shot dead within Calcutta High Court in 1909. In 1910, Shamsul Alam, Deputy Superintendent of Bengal Police responsible for investigating the Alipore Bomb case, was shot dead on the steps of Calcutta High Court. Naren Bannerjee, the police officer who arrested Kshudiram Bose, was murdered in 1910. These assassinations led up to the uncovering of Jatin's network, precipitating the Howrah-Sibpur Conspiracy case. Undeterred, the Samiti's networks continued the attempts on political violence and assassinations, using its base in Chandernagore. The most notable was the attempt on the life of Viceroy of India in 1912 in a conspiacy headed by Rash Behari Bose. However, the most serious threat organised by the Samiti arose in 1914 when, with the clouds of war gathering in Europe in 1914, the Samiti began liaising with revolutionary groups abroad and with Imperial Germany to overthrow the British Raj with a Pan-Indian Mutiny.