India and the stuff that happened.
The people of India used to speak Indian.
The British became quite powerful in India, therefore they introduced their own preference of language upon the inhabitants. The country began to speak the "King's English" per say.
The British have brought the Industrial Revolution with them to India. As the British have gained a significant amount of control in India, it was not large effort to have it introduced. The Indians changed the way they travel because of the British influence to advance their technology. All they did up until that point was more basic modes of transport. HOW EXCITING!
People were upsetted by the unfair treatment of the things the British were introducing. They were trying to get the British to discontinue their plans. They had not rebelled before, this is why it is both important and called "The First" Indian Rebellion.
India is becoming ruled more by the British.
The Indians are letting the British consume their country in a way. They used to be an Indian majority country.