The Indian Rebellion of 1857 was a large scale but ultimately unsuccessful rebellion by India against British colonization forces. The conflict initiated among the sepoys- Indian troops recruited under the British East India Company- who were suspicious that the British were forcing them to ingest grease made from pig and cow lard from the gun cartridges of the Enfield rifle during military training, which would have been extremely offensive to Muslims and Hindus. This incident was indicative of larger Indian resentment that the British were dominating and disrespecting traditional culture. Fury over perceived British Westernization efforts contributed to a mutiny of sepoys, who recaptured Delhi and placed Mughal emperor Bahadur Shah II in power. The rebellion was marked by ferocity and brutal massacres, but ultimately ended with the British retaining control of India by 1859. They abolished the East India Company and placed India directly under British government rule in order to tighten control of the native people.
Source:
Britannica, The Editors of Encyclopaedia. "Indian Mutiny". Encyclopedia Britannica, 4 Nov. 2020, https://www.britannica.com/event/Indian-Mutiny.