<br />Based on a rough comparison of the sketchy pre-1857 regional demographic data and the first 1871 Census of India, probably 800,000 Indians were killed, and very likely more, both in the rebellion and in the famines and epidemics of disease that were caused as a result in its immediate aftermath.
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The Indian Rebellion of 1857 was a major uprising in India in 1857–58 against the rule of the British East India Company, which functioned as a sovereign power, including military forces, on behalf of the British Crown. The rebellion began on 10 May 1857 as a mutiny of sepoys of the company's garrison in Meerut, a town northeast of Delhi. It then erupted into other mutinies and civilian rebellions, chiefly in the upper Gangetic plain and central India,