Anushilan Samiti
Anushilan Samiti (Ōnūshīlōn sōmītī, "lit": body-building society) was a Bengali Indian organisation that existed in the first quarter of the twentieth century, and propounded 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, if somewhat independent, arms in East and West Bengal identified as Dhaka Anushilan Samiti centred in Dhaka (modern day Bangladesh), and the Jugantar group (centred at Calcutta) respectively.
Hindu nationalism
In 1910, when, Aurobindo withdrew from political life and decided to live a life of renounciate, the Anushilan Samiti declined. One of the revolutionaries, Jatindra Das Mukherjee, who managed to escape the trial started a group which would be called Jugantar. Jugantar continued with its armed struggle with the British, but the arrests of its key members and subsequent trials weakened its influence. Many of its members were imprisoned for life in the notorious Andaman Cellular jail.