https://simple.wikipedia.org/wiki/Indian_Rebellion_of_1857
The Indian Rebellion of 1857, also called the Great Indian Event of 1857, the Indian Mutiny, the Sepoy Mutiny, India's First War of Independence or India's First Struggle for Independence, began on 10 May 1857 at Meerut as a mutiny of sepoys of the British East India Company's army. Sepoys in the Presidency of Bengal revolted against their British officers.