Question

Why did the sepoy mutiny occur??

Answer 1

hey!
here is your answer
Sepoy mutiny took place because of the Enfield riffle introduced by British, which contained the fat of cow and pig, as cow was sacred to Hindus and pig was a taboo to Muslims, they thought that British tried to disturb their religion, by asking them to use this riffle
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Answer 2

By the year 1857 the British had established complete political control of India. ... The mutiny of the Sepoy (= native troops in the British army) began on May 10, 1857, when Indian soldiers who had been placed in irons for refusing to accept new cartridges were rescued by their comrades.