Two primary centers of the Indian National Movement were:
1. Calcutta (Kolkata): As the capital of British India for most of the colonial era, Calcutta was a pivotal hub for political action during the Indian National Movement. The city was the backdrop for significant events such as the Indian National Congress's establishment in 1885, the Swadeshi Movement, and numerous demonstrations against British colonial authority. Calcutta also hosted many important Indian National Congress sessions and was a focal point for revolutionary activities.
2. Bombay (Mumbai): Bombay served as another critical center, playing a vital role in India's fight for independence. The city saw many strikes, protests, and movements, notably the Quit India Movement in 1942. It was also the residence of influential nationalists, leaders, and thinkers, including Bal Gangadhar Tilak and Dadabhai Naoroji, whose contributions to the national cause were substantial. The Bombay Presidency also significantly influenced the nation's early political development.