Anushilan Samiti
Anushilan and Jugantar each were organised on different lines, reflecting their divergence. "Anushilan Samiti" was centrally organised, with a rigid discipline and vertical hierarchy. Jugantar, was more loosely organised as an alliance of groups, acting under local leaders that occasionally coordinated their actions together. The prototype of Jugantar's organisation was Barin Ghosh's organisation set up in 1907, in the run-up to the Manicktolla conspiracy. It sought to emulate the model of Russian revolutionaries that was described by Frost. The regulations of the central Dhaka organization of the "Anushilan Samiti" were written down, and reproduced and summarised in government reports. According to one estimate, the Dacca Anushilan Samiti had at one point 500 branches, mostly in the eastern districts of Bengal, with 20,000 members. Branches were opened later in the western districts, Bihar, and the United Provinces. Shelters for absconders were established in Assam and in two farms in Tripura. Organisational documents shows a primary division between, on the one hand the two active leadersBarin Ghosh and Upendranath Bannerjee, and the rank-and-file on the other. Higher leaders including Aurobindo were supposed to be known only to the active leaders. Erstwhile members of "Anushilan", particularly those of the Maniktala group, had suggested that the each group were interconnected with a vast web of secret societies throughout British India. However historian Peter Heehs concludes the links between provinces were limited to contacts between a few individuals like Aurobindo who was familiar with leaders and movements in Western India. He concludes the Maniktala society had links between the other groups and the Manicktalla society, such as the Anushilan and Atmannati Samitis, were more often competitive than co-operative. An internal circular of circa 1908 written by Pulin Behari Das, describes the division of the organisation in Bengal, which largely followed British administrative divisions, with central "Samitis" linked with a few small Samitis.
Anushilan Samiti
Through the 1920s and 1930s, many Anushilan members began identifying with Communism and leftist ideologies. Many of them studying Marxist–Leninist literature whilst serving long jail sentences. A minority section broke away from the Anushilan movement and joined the Communist Consolidation, and later the Communist Party of India. Former Jugantar leader Narendranath Bhattacharya, now known as M. N. Roy, became an influential member of the Communist International, helping to find the Communist Party of India. The majority of the Anushilanite Marxists, whilst having adopted Marxist–Leninist thinking, felt hesitant over joining the Communist Party. Holding sharp differences with the CPI and Royist ideologies, the Anushilan marxists decided to join Congress Socialist Party (CSP), but keeping a separate identity within the party. The RSP, which derived from the "Samiti", held a strong influence in parts of Bengal. The psrty sent two parliamentarians in the 1952 Lok Sabha elections, both previously "Samiti" members. In 1969 RSP sympathizers in East Pakistan formed the Shramik Krishak Samajbadi Dal (SKSD). RSP and SKSD have maintained close ties since. The RSP is a minor partner in the Left Front which ruled the Indian state of West Bengal for 34 uninterrupted years. It also holds influence in South India, notably in parts of Kerala. The SUCI, another left wing party with a presence in Bengal, was founded in 1948 by Anushilan members.