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Effects of First World War: The War led to a huge increase in defence expenditure. This was financed by war loans and by increasing taxes. Customs duties were raised and income tax was introduced to raise extra revenue. Prices of items increased during the war years. The prices doubled between 1913 and 1918. The common people were the worst sufferers because of price rise. Forced recruitment of rural people in the army was another cause of widespread anger among people.Crop failure in many parts of India resulted in acute shortage of food. Influenza epidemic further aggravated the problem. According to 1921 census, about 12 to 13 million people died because of famines and epidemic.