Explanation:

The Indian National Army (INA) was originally founded by Capt Mohan Singh in Singapore in September1942 with Japan's Indian POWs in the Far East. This was along the concept of- and with support of- what was then known as the Indian Independence League,headed by expatriate nationalist leader Rash Behari Bose. The first INA was however disbanded in December 1942 after disagreements between the Hikari Kikan and Mohan singh, who came to believe that the Japanese High Command was using the INA as a mere pawn and Propaganda tool. Mohan Singh was taken into custody and the troops returned to the Prisoner-of-War camp. However, the idea of a liberation army was revived with the arrival of Subhas Chandra Bose in the Far East in 1943. In July, at a meeting in Singapore, Rash Behari Bose handed over control of the organisation to Subhas Chandra Bose. Bose was able to reorganise the fledging army and organise massive support among the expatriate Indian population in south-east Asia, who lent their support by both enlisting in the Indian National Army, as well as financially in response Bose's calls for sacrfice for the national cause.
At its height it consisted of some 85,000 regular troops, including a separate women's unit, the Rani of Jhansi Regiment ( named after Rani Lakshmi Bai), which is seen as a first of its kind in Asia. Even when faced with military reverses, Bose was able to maintain support for the Azad Hind movement. Spoken as a part of a motivational speech for the Indian National Army at a rally of Indians in Burma on July 4, 1944, Bose's most famous quote was "Give me blood, and I shall give you freedom!". In this, he urged the people of India to join him in his fight against the British Raj. Spoken in Hindi, Bose's words are highly evocative. The troops of the INA were under the aegis of a provisional government, the Azad Hind Government, which came to produce its own currency, court and civil code, and was recognised by nine Axis states—Germany, Japan, Italy, the Independent State of Croatia, Wang Jingwei's Government in Nanjing, Thailand, a provisional government of Burma, Manchukuo and Japanese-controlled Philippines. Recent researches have shown that the USSR too had recognised the "Provisional Government of Free India". Of those countries, five were authorities established under Axis occupation. This government participated as a delegate or observer in the so-called Greater East Asia Co-Prosperity Sphere.

The INA's first commitment was in the Japanese thrust towards Eastern Indian frontiers of Manipur. INA's special forces, the Bahadur Group, were extensively involved in operations behind enemy lines both during the diversionary attacks in Arakan, as well as the Japanese thrust towards Imphal and Kohima, along with the Burmese National Army led by Ba Maw and Aung San. A year after the islands were taken by the Japanese, the Provisional Government and the INA were established in the Andaman and Nicobar Islands with Lt Col. A.D Loganthan appointed its Governor General. The islands were renamed Shaheed (Martyr) and Swaraj (Self-rule). However, the Japanese Navy remained in essential control of the island's administration. During Bose's only visit to the islands in late in 1943, when he was carefully screened from the local population by the Japanese authorities, who at that time were torturing the leader of the Indian Independence League on the Islands, Dr. Diwan Singh (who later died of his injuries, in the Cellular Jail). The islanders made several attempts to alert Bose to their plight, but apparently without success. Enraged with the lack of administrative control, Lt. Col Loganathan later relinquished his authority to return to the Government's head quarters in Rangoon.
On the Indian mainland, an Indian Tricolour, modeled after that of the Indian National Congress, was raised for the first time in the town in Moirang, in Manipur, in northeastern India. The towns of Kohima and Imphal were placed under siege by divisions of the Japanese, Burmese and the Gandhi and Nehru Brigades of I.N.A. during the attempted invasion of India, also known as Operation U-GO. However, Commonwealth forces held both positions and then counter-attacked, in the process inflicting serious losses on the besieging forces, which were then forced to retreat back into Burma.
At the time of the Great Bengal Famine of 1943, during which millions died of starvation as a consequence of British inefficiency and indifference, Bose had offered (through radio) to provide Burmese rice to the victims of the famine. The British authorities in India (and in the UK) refused the offer, arguing that it was made for propaganda purposes.
Bose had hoped that large numbers of soldiers would desert from the Indian Army when they would discover that INA soldiers were attacking British India from the outside. However, this did not materialise on a sufficient scale. Instead, as the war situation worsened for the Japanese, troops began to desert from the INA. At the same time Japanese funding for the army diminished, and Bose was forced to raise taxes on the Indian populations of Malaysia and Singapore, sometimes extracting money by force. When the Japanese were defeated at the battles of Kohima and Imphal, the Provisional Government's aim of establishing a base in mainland India was lost forever. The INA was forced to pull back, along with the retreating Japanese army, and fought in key battles against the British Indian Army in its Burma campaign, notable in Meiktilla, Mandalay, Pegu, Nyangyu and Mount Popa. However, with the fall of Rangoon, Bose's government ceased be an effective political entitiy. A large proportion of the INA troops surrendered under Lt Col Loganathan when Rangoon fell. The remaining troops retreated with Bose towards Malaya or made for Thailand. Japan's surrender at the end of the war also led to the eventual surrender of the Indian National Army, when the troops of the British Indian Army were repatriated to India and some tried for treason.
His other famous quote was, "Delhi chalo", meaning "On to Delhi!". This was the call he used to give the INA armies to motivate them. "Jai Hind", or, "Glory to India!" was another slogan used by him and later adopted by the Government of India and the Indian Armed Forces.