The Indian Rebellion of 1857, also known as the Sepoy Mutiny, was a major uprising against the British East India Company's rule in India. It began in May 1857 when Indian soldiers, or sepoys, revolted due to grievances over pay, treatment, and the introduction of new rifle cartridges rumored to be greased with animal fat, which offended both Hindu and Muslim soldiers. The rebellion spread quickly across northern and central India, with significant participation from various groups, including local rulers and civilians. Although the uprising was eventually suppressed by British forces by 1858, it marked a turning point in Indian history, leading to the end of the East India Company's rule and the establishment of direct British governance over India.