ANGLOSIKH RELATIONS need to be traced to the transformation of the British East India Company, a commercial organization, into a political power in India . Victory at Plassey (23 June 1757) brought Bengal under the de facto control of the British, and that at Buxar (22 October 1764) made Oudh a British protectorate. By August 1765, the grant of the diwani rights to the Company by the Mughal Emperor Shah `Alam made them the virtual rulers of Bengal, Bihar and Orissa. Robert Clive (1725-74), the victor of Plassey and governor of Bengal during 1765-67, watched with interest the repeated invasions of India by Ahmad Shah Durrani and rejoiced at his final repulse at the hands of the Sikhs in 1766-67.
SIKHS` RELATIONS WITH NAWAB OF OUDH. For a whole decade prior to 1774, Sikhs had been regularly raiding and pillaging upper Ganga Yamuna Doab and Ruhilkhand bordering on Oudh. Yet they had not entered the territory of the Nawab, Shuja` udDaulah, who had become an ally of the British since his defeat in the battle of Buxar (22 October 1764). With British help he conquered Ruhilkhand in 1774, thus eliminating the buffer between himself and the Sikhs. Zabita Khan, the defeated Ruhila chief, invited the Sikhs in 1776 to join him in attacking the imperial domains.