Nationalist movement began in the hearts of young Indians.
The Mogul Empire was in a state of collapse by the 1720s. Other European powers were competing for control in India, and sought alliances with the shaky states that inherited the Mogul territories.
The British interests in India, under the leadership of Robert Clive, gained military victories from the 1740s onward, and with the Battle of Plassey in 1757 were able to establish dominance.
The East India Company established its own army in India, which was composed of British troops as well as native soldiers called sepoys.
The Indian Rebellion of 1857, which was also called the Indian Mutiny, or the Sepoy Mutiny, was a turning point in the history of Britain in India.
British control of India would continue, mostly peacefully, throughout the remainder of the 19th century. It wasn’t until Lord Curzon became Viceroy in 1898, and instituted some very unpopular policies, that an Indian nationalist movement began in the hearts of young Indians to stir.
The nationalist movement developed over decades, and, of course, India finally achieved its independence in 1947. You can hear more stories in Tamil thro “you Tube.’