 While he was studying in Dhaka College, Dinesh joined Bengal Volunteers - a group organised by Subhas Chandra Bose in 1928, at the occasion of Calcutta session of the Indian National Congress.Soon the Bengal Volunteers transformed itself to a more active revolutionary association and planned to kill infamous British police officers.For a short while, Dinesh Gupta was in Midnapore training local revolutionaries in the use of firearms.