What was the immediate cause of the Revolt of 1857?

Mixing bone dust of cows and pigs in atta. Cartridges of Enfield Rifle. Introduction of western education Abolition of Sati system.

Cartridges of Enfield Rifle.

Cartridges of Enfield Rifle, which were rumored to be coated with the fat of pigs and cows was the immediate cause of the Revolt of 1857.