a major, but ultimately unsuccessful, uprising in India in 1857–58 against the rule of the British East India Company, which functioned as a sovereign power on behalf of the British Crown (dec 31, 1856 – feb 5, 1861)
Description:
https://en.wikipedia.org/wiki/Indian_Rebellion_of_1857Added to timeline:
Date:
dec 31, 1856
feb 5, 1861
~ 4 years