Introduction:
The Indian Association was a political organization formed in 1876 by Surendranath Banerjee and Ananda Mohan Bose. It aimed to unite Indians and fight for the rights and interests of the Indian people during the British colonial period. One of the significant events organized by the Indian Association was the All-lndia National Conference held in Calcutta.

Details:
The All-lndia National Conference sponsored by the Indian Association took place in Calcutta in 1883. It was a crucial gathering as it brought together leaders from various parts of India to discuss and address the issues faced by the Indian people under British rule. The conference provided a platform for these leaders to express their opinions, share ideas, and work towards the betterment of the Indian society.

Significance:
The All-lndia National Conference held in Calcutta in 1883 played a significant role in the Indian nationalist movement for several reasons:

1. Unity: The conference served as a platform to foster unity among leaders from different regions of India. It provided an opportunity for these leaders to come together and discuss common issues faced by the Indian people and work towards a collective solution.

2. Political Awakening: The conference helped in raising political awareness among the Indian masses. The discussions and speeches delivered during the conference highlighted the exploitation and discrimination faced by Indians under British rule. This led to an increased political consciousness among the Indian population.

3. Formation of All-lndia National Conference: The conference led to the formation of the All-lndia National Conference, which later became an important political organization in the fight for Indian independence. The organization played a crucial role in mobilizing public opinion and organizing protests against British rule.

4. Policy Formulation: The conference provided a platform for leaders to discuss and formulate policies for the betterment of Indian society. They deliberated on issues such as education, social reforms, economic development, and political rights of Indians.

5. International Attention: The conference garnered international attention and highlighted the Indian nationalist movement to the world. It helped in creating awareness about the Indian struggle for independence and garnered support from international communities sympathetic to the cause.

Conclusion:
The All-lndia National Conference sponsored by the Indian Association in 1883 at Calcutta was a significant event in the Indian nationalist movement. It brought together leaders from various parts of India, fostered unity, raised political awareness, and paved the way for the formation of the All-lndia National Conference. The conference played a crucial role in shaping the course of the Indian independence movement and highlighting the grievances of the Indian people under British colonial rule.