Earnest organisation of the INA in preparation for the battle began after news of Quit India had reached South-east Asia. This uprising within India was taken to be the signal from Congress and Indian people that the INA and the league had been waiting for. Iwakuro visited Tokyo in August 1942, and on his return had expected to train and equip 15,000 men over three months. These men were to be moved to Burma in stages to avoid concentrating in Singapore. Mohan Singh's ambition, however, outpaced Iwakuro. Lists of men intending to enlist were collected from individual camp commanders. Hugh Toye, a British intelligence officer in South-east Asia during the war, noted in his 1959 history of the army that although Mohan Singh may not have personally approved forcible recruiting, the Bidadary "Concentration Camp" became notorious for beatings by "sweeper Nimbu". Mohan Singh himself, however, admitted to severity when it came to recruiting, warning non-volunteer officers to not influence their men. Persistent offenders were separated from their men. Over one hundred officers were separated from their men for such reasons. Some 40,000 men proceeded to pledge their allegiance to Mohan Singh for Indian independence. The British-Indian army sub-unit structure was preserved to hasten operational deployments. Almost 16,000 men comprised this first division of the INA. According to the reviews available, the INA was to be organised of twelve infantry battalions of 650 troops, organised into four guerrilla regiments of 2000 men. Battalion and regimental commanders were appointed on 5 September, and assumed their commands on the 8th and 9 September. A few days later it was reviewed by Rash Behari and Mohan Singh. The first of these was the Hindustan Field Force, under the command of J.K. Bhonsle. The unit was formed at Singapore and comprised three battalions derived from troops of the 17th Dogra Regiment, Garhwal Rifles and the 14th Punjab Regiment (now a part of the Pakistani Army) and had a strength of nearly 2000 troops. The Hindustan Field force was also to include a heavy gun battalion, a company each of transport corps, signal corps, engineering corps and a company of medical corps.