Anushilan Samiti () was an Indian fitness club, which was actually used as an underground society for anti-British revolutionaries. In the first quarter of the 20th century it supported revolutionary violence as the means for ending British rule in India. The organisation arose from a conglomeration of local youth groups and gyms (akhara) in Bengal in 1902. It had two prominent, somewhat independent, arms in East and West Bengal, Dhaka Anushilan Samiti (centred in Dhaka), and the Jugantar group (centred in Calcutta). From its foundation to its dissolution during the 1930s, the Samiti challenged British rule in India by engaging in militant nationalism, including bombings, assassinations, and politically motivated violence. The Samiti collaborated with other revolutionary organisations in India and abroad. It was led by the nationalists Aurobindo Ghosh and his brother Barindra Ghosh, influenced by philosophies like Italian Nationalism, and the Pan-Asianism of Kakuzo Okakura. Ullaskar Dutta used to be the Jugantor group's principal bomb maker until Hemchandra Quanungo returned from Paris learning bomb making and explosive chemistry. The Samiti was involved in a number of noted incidents of revolutionary attacks against British interests and administration in India, including early attempts to assassinate British Raj officials. These were followed by the 1912 attempt on the life of the Viceroy of India, led by Rash Behari Bose and Basanta Kumar Biswas, and the Seditious conspiracy during World War I, led by Jatindranath Mukherjee. The organisation moved away from its philosophy of violence in the 1920s due to the influence of the Indian National Congress and the Gandhian non-violent movement. A section of the group, notably those associated with Sachindranath Sanyal, remained active in the revolutionary movement, founding the Hindustan Republican Association in north India. A number of Congress leaders from Bengal, especially Subhash Chandra Bose, were accused by the British Government of having links with the organisation during this time.