The Sepoy Mutiny, also known as the Indian Rebellion of 1857, 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 various grievances, including cultural insensitivity and the introduction of new rifle cartridges rumored to be greased with animal fat. The rebellion spread quickly across northern and central India. The mutiny was marked by significant battles and brutal reprisals from both sides. Although it was ultimately suppressed by British forces by 1858, the rebellion led to significant changes in British policy, including the dissolution of the East India Company and the establishment of direct British rule over India, known as the British Raj.