British Raj
1939–1945: World War II

With the outbreak of World War II in 1939, the viceroy, Lord Linlithgow, declared war on India's behalf without consulting Indian leaders, leading the Congress provincial ministries to resign in protest. The Muslim League, in contrast, supported Britain in the war effort and maintained its control of the government in three major provinces, Bengal, Sind and the Punjab.

While the Muslim League had been a small elite group in 1927 with only 1300 members, it grew rapidly once it became an organisation that reached out to the masses, reaching 500,000 members in Bengal in 1944, 200,000 in Punjab, and hundreds of thousands elsewhere. Jinnah now was well positioned to negotiate with the British from a position of power. Jinnah repeatedly warned that Muslims would be unfairly treated in an independent India dominated by the Congress. On 24 March 1940 in Lahore, the League passed the " Lahore Resolution ", demanding that, "the areas in which the Muslims are numerically in majority as in the North-Western and Eastern zones of India should be grouped to constitute independent states in which the constituent units shall be autonomous and sovereign." Although there were other important national Muslim politicians such as Congress leader Ab'ul Kalam Azad, and influential regional Muslim politicians such as A. K. Fazlul Huq of the leftist Krishak Praja Party in Bengal, Fazl-i-Hussain of the landlord-dominated Punjab Unionist Party, and Abd al-Ghaffar Khan of the pro-Congress Khudai Khidmatgar (popularly, "red shirts") in the North West Frontier Province, the British, over the next six years, were to increasingly see the League as the main representative of Muslim India.

The Congress was secular and strongly opposed to having any religious state. It insisted there was a natural unity to India, and repeatedly blamed the British for "divide and rule" tactics based on prompting Muslims to think of themselves as alien from Hindus. Jinnah rejected the notion of a united India, and emphasised that religious communities were more basic than an artificial nationalism. He proclaimed the Two-Nation Theory, stating at Lahore on 23 March 1940:

are not religions in the strict sense of the word, but are, in fact, different and distinct social orders and it is a dream that the Hindus and Muslims can ever evolve a common nationality... The Hindu and Muslim belong to two different religions, philosophies, social customs and literature. They neither intermarry nor interdine together and indeed they belong to two different civilizations which are based mainly on conflicting ideas and conceptions. Their aspects on life and of life are different... To yoke together two such nations under a single state, one as a numerical minority and the other as a majority must lead to growing discontent and final destruction of any fabric that may be so built up for the government of such a state.

While the regular Indian army in 1939 included about 220,000 native troops, it expanded tenfold during the war, and small naval and air force units were created. Over two million Indians volunteered for military service in the British Army. They played a major role in numerous campaigns, especially in the Middle East and North Africa. Casualties were moderate (in terms of the world war), with 24,000 killed; 64,000 wounded; 12,000 missing (probably dead), and 60,000 captured at Singapore in 1942.

London paid most of the cost of the Indian Army, which had the effect of erasing India's national debt; it ended the war with a surplus of £1,300 million. In addition, heavy British spending on munitions produced in India (such as uniforms, rifles, machine-guns, field artillery, and ammunition) led to a rapid expansion of industrial output, such as textiles (up 16%), steel (up 18%), and chemicals (up 30%). Small warships were built, and an aircraft factory opened in Bangalore. The railway system, with 700,000 employees, was taxed to the limit as demand for transportation soared.

The British government sent the Cripps mission in 1942 to secure Indian nationalists' co-operation in the war effort in exchange for a promise of independence as soon as the war ended. Top officials in Britain, most notably Prime Minister Winston Churchill, did not support the Cripps Mission and negotiations with the Congress soon broke down.

Congress launched the Quit India Movement in July 1942 demanding the immediate withdrawal of the British from India or face nationwide civil disobedience. On 8 August the Raj arrested all national, provincial and local Congress leaders, holding tens of thousands of them until 1945. The country erupted in violent demonstrations led by students and later by peasant political groups, especially in Eastern United Provinces, Bihar, and western Bengal. The large wartime British Army presence crushed the movement in a little more than six weeks; nonetheless, a portion of the movement formed for a time an underground provisional government on the border with Nepal. In other parts of India, the movement was less spontaneous and the protest less intensive; however, it lasted sporadically into the summer of 1943.

Earlier, Subhas Chandra Bose, who had been a leader of the younger, radical, wing of the Indian National Congress in the late 1920s and 1930s, had risen to become Congress President from 1938 to 1939. However, he was ousted from the Congress in 1939 following differences with the high command, and subsequently placed under house arrest by the British before escaping from India in early 1941. He turned to Nazi Germany and Imperial Japan for help in gaining India's independence by force. With Japanese support, he organised the Indian National Army, composed largely of Indian soldiers of the British Indian Army who had been captured by the Japanese in the Battle of Singapore. As the war turned against them, the Japanese came to support a number of puppet and provisional governments in the captured regions, including those in Burma, the Philippines and Vietnam, and in addition, the Provisional Government of Azad Hind, presided by Bose.

Bose's effort, however, was short-lived. In mid-1944 the British Army first halted and then reversed the Japanese U-Go offensive, beginning the successful part of the Burma Campaign. Bose's Indian National Army largely disintegrated during the subsequent fighting in Burma, with its remaining elements surrendering with the recapture of Singapore in September 1945. Bose died in August from third degree burns received after attempting to escape in an overloaded Japanese plane which crashed in Taiwan, which many Indians believe did not happen. Although Bose was unsuccessful, he roused patriotic feelings in India.
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