The CPI began efforts to build a party organisation inside India. Roy made contacts with Anushilan and Jugantar groups in Bengal. Small communist groups were formed in Bengal (led by Muzaffar Ahmed), Bombay (led by S.A. Dange), Madras (led by Singaravelu Chettiar), United Provinces (led byShaukat Usmani) and Punjab (led by Ghulam Hussain). However, only Usmani became a CPI party member.[3]
During the 1920s and beginning of 1930s the party was badly organised, and in practice there were several communist groups working with limited national coordination. The British colonial authorities had banned all communist activity, which made the task of building a united party very difficult. Between 1921 and 1924 there were three conspiracy trials against the communist movement; First Peshawar Conspiracy Case, Moscow Conspiracy Case and the Cawnpore Bolshevik Conspiracy Case. In the first three cases, Russian-trained muhajir communists were put on trial. However, the Cawnpore trial had more political impact. On 17 March 1924, M.N. Roy, S.A. Dange, Muzaffar Ahmed, Nalini Gupta, Shaukat Usmani, Singaravelu Chettiar, Ghulam Hussain and R.C. Sharma were charged, in Cawnpore (now spelt Kanpur) Bolshevik Conspiracy case. The specific charge was that they as communists were