Bose's entry into politics was marked by intense nationalist fervor under the mentorship of Deshbandhu Chittaranjan Das (C.R. Das).
- Political Guru: Subhash Chandra Bose regarded Chittaranjan Das (C.R. Das) as his political mentor, working closely with him in the Swaraj Party and municipal administration of Calcutta.
- CEO of Calcutta Corporation: When C.R. Das became the Mayor of Calcutta in 1924, Bose was appointed the Chief Executive Officer (CEO) of the Calcutta Municipal Corporation, initiating major civic reforms.
- Imprisonment in Mandalay: Due to his revolutionary links and nationalist activities, Bose was arrested in 1924 under the Bengal Ordinance and imprisoned in Mandalay jail (Burma) until 1927.
- Opposition to Nehru Report: Along with Jawaharlal Nehru, Bose opposed the Nehru Report's recommendation of 'Dominion Status', jointly forming the 'Independence for India League' in 1928 to press for complete independence (Purna Swaraj).