Indian National Army - INA in Operation

INA in Operation

Main article: Battles and Operations of the INA See also: India in World War II

The British were given advance knowledge about the impending Japanese offensive on its North-eastern frontier by Bhagat Ram Talwar (codenamed "Silver"), a communist double-agent in Kabul and a confidant of Subhas Chandra Bose, after Bose unsuspectingly revealed it to him.

As the Japanese offensive opened, the INA sent its first forces into battle. The INA's own strategy was to avoid set-piece battles for which it lacked arms, armament as well as man-power. Initially, it sought to obtain arms as well as increase its ranks from British Indian soldiers expected to defect to patriotic cause. Once the Japanese forces were able to break the British defences at Imphal, the INA would cross the hills of North-East India into the Gangetic plain, where it was to work as a guerrilla army and expected to live off the land, garner support, supplies, and ranks from amongst the local populace to ultimately touch off a revolution.

Prem Kumar Sahgal, an officer of the INA once Military secretary to Subhas Bose and later tried in the first Red Fort trials, explained that although the war itself hung in balance and nobody was sure if the Japanese would win, initiating a popular revolution with grass-root support within India would ensure that even if Japan lost the war ultimately, Britain would not be in a position to re-assert its colonial authority, which was ultimately the aim of the INA and Azad Hind.