The Indian National Army (INA) was a military force formed by Indian ex-servicemen and nationalist volunteers during the Second World War, with the aim of fighting for Indian independence from the British Raj. The INA was formed in 1942, under the leadership of Subhas Chandra Bose, with the support of the Japanese and the Axis Powers.

The INA was the first Indian military unit to be formed in the modern era, and its contribution to the Indian struggle for independence was immense. The INA was instrumental in spreading the message of Indian independence, and in galvanizing support for the freedom struggle. The INA provided a platform for the Indian people to express their defiance and patriotism, which in turn helped to fuel the struggle for independence.

The INA was active in both the Eastern and Western theatres of the Second World War and was involved in several major battles. The INA fought alongside the Japanese forces in the Battle of Imphal and the Battle of Kohima in India and also conducted operations in the islands of Arakan and Sumatra in the Bay of Bengal. The INA also fought alongside the Japanese in the Battle of Singapore, which marked the downfall of the British Raj in Asia.

The INA played a major role in creating popular support for the cause of Indian independence. It was the first Indian military force to hold public rallies and to create an organized political party – the Indian Independence League – which was devoted to achieving independence. The INA's activities helped to draw attention to the cause of Indian independence and to create a sense of national pride.

The INA was also a major source of inspiration for the Indian nation after independence. Its courage and commitment to the cause of Indian independence were an inspiration to countless Indians, who went on to fight for the nation's freedom.

The INA's contribution to India's freedom struggle was immense and has been remembered with great reverence by historians and Indian nationalists. In many ways, the INA helped to shape India's destiny and to inspire people to fight for their freedom. Its legacy has been an inspiration to generations of Indians, who have gone on to fight for Indian independence and for a better future for the nation.