India to compensate for the loss of the American colonies is not proved; but the rivalry with France, which in Europe placed Britain at the head of coalition after coalition against the French republic and empire, made Mornington's rule in India an epoch of enormous and rapid extension of British power. Robert Clive won, laid down the foundation stone of British Empire in India and Warren Hastings consolidated the British ascendancy in India, but Mornington extended it into an Empire. On the voyage outwards, he formed the design of annihilating French influence in the Deccan.
These three persons 1. Robert Clive, 2. Warren Hastings, and 3. Lord Wellesly completed the process of putting India into the centre of the colonial country of British Empire.
1757, 23rd June Battle of Plassey : The whole Mughal army was defeated. Mir jaffar betrayed and joined with Clive. Clive got 8 lakh pound from Mir Jaffar and offered him the Masnad. The eldest son of Shah Alam, Sahajada, was also defeated by Clive and got a land from Mir Jaffar with a revenue potentioal of 30,000 pound.
1761, 6 Jan Sadashib Rao and Ahmed Khan Abdali was defeated at Battle of Panipath.
1760, Vancitart was appointed as Governor of Bengal. He replaced Mir Jaffar by Mir Kashim who paid regularly 2 lakhs pound and he gifted one-third of his kingdom i.e., Mednipore, Burdwan and Chattagram to East India Company.