The Great Indian Mutiny, also known as the Sepoy Mutiny of 1857, was a major uprising against the British East India Company's rule in India. It began 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 across northern and central India, with significant participation from various groups, including local rulers and civilians. Although the mutiny was eventually suppressed by British forces, 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.