The Indian Mutiny, or 1st Indian War of Independence, involved the private Armies of the East India Company, and ended in 1858.
The British Army didn't get involved until after the Mutiny.
The 76th regiment went to Corfu in 1848 and on to Malta in 1850 before sailing for Saint John, New Brunswick in March 1853. It was garrisoned at Fredericton in New Brunswick before embarking for home again in September 1857. It embarked for India in September 1863 and was stationed in Fort St. George, Madras.
An ancestor of mine was a Veterinary Surgeon with the Bengal Light Cavalry, and survived a massacre by hiding in a cellar!