Arriving in Tokyo in May 1943, Bose attracted the attention of the Japanese high command, including Hideki Tojo, Japan's premier. The Japanese agreed to cooperate in founding an Axis-supported Indian National Army (INA) in Southeast Asia. Bose was flown to Singapore and became commander of the INA and head of the Free India provisional government (Arzi Hukumat-e-Azad Hind).
The INA included both Indian prisoners of war from Singapore and Indian civilians in Southeast Asia. The strength of INA grew to 43,000 and fought Allied forces in 1944 inside the borders of India at Imphal and in Burma. For Bose any means and any ally were acceptable in the struggle to liberate India. By the end of World War II none of Bose's Axis allies had helped, and Bose then turned to the Soviet Union.  Three officers of the INA were tried after the war in Delhi; the trial attracted so much popular sympathy (including statements by Nehru and Gandhi that the men were great patriots) that the British decision to withdraw from India followed. Bose indirectly and posthumously achieved his goal of Indian independence.
Officially, Bose died in a plane crash over Taiwan, while flying to Tokyo on 18 August 1945. It is believed that he was on route to the Soviet Union in a Japanese plane when it crashed in Taiwan, burning him fatally. However, his body was never recovered, a