What was the revolt by Indian soldiers against the British in 1857 called?

The Sepoy Mutiny.

Explanation:

The Sepoy Mutiny, along with the other dozen names given to this mutiny, was when the Sepoy rose against British ruling. The Indians were not happy with the British and what they stood for. The British wanted to replace very important Native princes, and many people thought their rulings were too harsh. Along with this, the Sepoy Indians were not satisfied being in the British army. They had very small pay and were not treated equally or fairly compared to white soldiers.

The mutiny began in 1857 when the Indians started to revolt and burn down homes and even release people from prisons. They ended up killing many people along with some British soldiers.